Now updated for CSW19. New words, if any, and new inflections of existing words, are shown in red.
| addlepated | muddleheaded. |
| agrestic | of or relating to the fields or country, rustic, uncouth. |
| analphabet | an illiterate; one who doesn't know the alphabet or the basics of something. |
| analphabete | an illiterate; one who doesn't know the alphabet or the basics of something. |
| archfool | a complete fool. |
| asinico | (Shakesp.) a stupid fellow. |
| asininity | stupidity. |
| backwoodsman | a provincial, a country bumpkin. |
| bammer | an idiot, fool. |
| bampot | (Scots) an idiot, fool. |
| barmpot | an idiot, fool. |
| bedunce | to make a dunce of. |
| beetlebrain | a heavy stupid person. |
| beetlebrained | stupid. |
| beetlehead | a heavy stupid person. |
| beetleheaded | like a beetlehead, stupid. |
| berk | (Coll.) a fool. |
| birdbrained | simple-minded. |
| blert | (Coll.) a foolish person. |
| blockhead | a stupid person. |
| blockheaded | stupid. |
| blockheadedly | (Adv.) BLOCKHEADED, stupid. |
| blockheadedness | the state of being blockheaded. |
| blockish | like a block; stupid, dull. |
| blockishly | (Adv.) BLOCKISH, like a block; stupid, dull. |
| blockishness | the state of being blockish. |
| bonehead | a stupid person. |
| boneheaded | stupid. |
| boneheadedness | the state of being boneheaded. |
| boobish | doltish. |
| booboisie | boobs as a class; the general public regarded as consisting of boobies. |
| boobyish | stupid; dull. |
| boobyism | being like a booby. |
| boofhead | (Aust. sl.) a stupid person. |
| boofy | muscular and strong but stupid. |
| borel | (Arch.) rustic, clownish; (noun) a boring tool. |
| borrel | (Arch.) rustic, clownish. |
| borrell | (Arch.) rustic, clownish. |
| brainless | without brains. |
| brainlessly | (Adv.) BRAINLESS, without brains. |
| brainlessness | the state of being brainless. |
| brainsickness | the state of being brainsick. |
| bucolic | of or relating to shepherds or herdsmen, pastoral (noun) a pastoral poet, a rustic |
| bucolically | (Adv.) BUCOLIC, rustic. |
| bufflehead | one who has a large head; a heavy, stupid fellow. |
| buffoon | a clown. |
| buffoonery | foolish or playful behavior. |
| buffoonish | like a buffoon. |
| bumpkin | a rustic, a yokel a spar projecting from the stern of a ship |
| bumpkinish | like a bumpkin. |
| bumpkinly | like a bumpkin. |
| burk | (Coll.) a fool. |
| butthead | a stupid person. |
| capocchia | (Shakesp.) a simpleton. |
| carl | a rude, rustic man; a churl. |
| carle | a rude, rustic man; a churl. |
| carlish | (Arch.) churlish. |
| charley | a credulous or inefficient person. |
| charlie | a credulous or inefficient person. |
| chawbacon | a bumpkin, a hick. |
| chipochia | (Shakesp.) a simpleton. |
| chowderhead | a foolish person. |
| chowderheaded | like a chowderhead, foolish, simple. |
| chucklehead | a foolish person. |
| chuckleheaded | of or like a chucklehead, foolish. |
| chuff | gruff (verb) to make a series of puffing sounds |
| churlishly | (Adv.) CHURLISH, incivil. |
| clarthead | a slow-witted person. |
| clodhopper | a clumsy, awkward fellow; a strong, heavy work shoe. |
| clodly | in a stupid fashion. |
| clodpate | a combination of a clod and a blockhead. |
| clodpated | stupid, doltish. |
| clodpole | a simpleton. |
| clodpoll | a simpleton. |
| clotpoll | (Shakesp.) a fool. |
| clouter | one who clouts, mends and botches. |
| clouterly | like a clouter, clownish. |
| cokes | a simpleton. |
| coof | (Scots) a lout, a dolt. |
| cretin | a person afflicted with cretinism. |
| cretinise | to make into a cretin. |
| cretinize | to make into a cretin. |
| cretinoid | resembling a cretin; (noun) someone resembling a cretin. |
| cretinous | like a cretin. |
| crumbum | a foolish or despicable person. |
| culchie | (Irish) rustic (noun) a rustic, a country labourer |
| daffily | (Adv.) DAFFY, daft. |
| daffiness | the state of being daffy. |
| daffy | daft (noun, coll.) a daffodil |
| daftie | a simpleton. |
| daftness | the quality of being daft. |
| damfool | stupid; (noun) a stupid person. |
| dawbake | (Dial.) a slow-witted person. |
| dawney | (Irish) dull or slow. |
| desipience | foolishness, trifling. |
| desipient | playing the fool; trifling. |
| dickhead | a foolish person. |
| dimbo | an unintelligent person > DIMBOS or DIMBOES. |
| dimmish | not very intelligent. |
| dimwit | a person of low intelligence. |
| dimwitted | stupid. |
| dingbat | (Aust. sl.) a fool. |
| dipshit | a stupid person. |
| dipstick | a stupid person. |
| ditz | a silly person. |
| dizzard | (Obs.) a blockhead. |
| dodderer | one who dodders. |
| doddipoll | (Obs.) a blockhead. |
| doddypoll | (Obs.) a blockhead. |
| dodoism | a stupid remark. |
| dof | (S. Afr.) stupid. |
| dolt | a heavy, stupid fellow. |
| doltish | like a dolt. |
| doltishly | (Adv.) DOLTISH, like a dolt. |
| doltishness | the state of being doltish. |
| donnard | (Scots) stupid, dull-witted. |
| donnart | (Scots) stupid, dull-witted. |
| donnerd | (Scots) stupid, dull-witted. |
| donnered | (Scots) stupid, dull-witted. |
| donnert | (Scots) stupid, dull-witted. |
| donsy | (Gaelic) unlucky; sickly. |
| doofus | a fool. |
| dopey | foolish. |
| dopeyness | the state of being dopey. |
| dopily | (Adv.) DOPY, foolish. |
| dopiness | the state of being dopy. |
| dopy | foolish. |
| dorb | (Aust. sl.) a stupid or inept person. |
| dorba | (Aust. sl.) a stupid or inept person. |
| dork | an idiot, an object of contempt; the penis. |
| dorkiness | the state of being dorky. |
| dorkish | idiotic, like a dork. |
| dorky | (Sl.) idiotic, contemptible. |
| dotant | (Shakesp.) one who dotes, a dotard. |
| dotard | one in his dotage. |
| dotardly | like a dotard, one in his dotage. |
| dotish | foolish; weak; imbecile. |
| dottily | (Adv.) DOTTY, feebleminded. |
| dottiness | the state of being dotty. |
| dovie | (Scots) stupid. |
| drippily | (Adv.) DRIPPY, silly, inane. |
| drippy | silly, inane. |
| driveler | one who drivels. |
| driveller | one who drivels. |
| drongo | any member of the family Dicruridae, glossy-black fork-tailed insect-catching birds of the Old World tropics; (Aust. sl.) an idiot. |
| dubbo | (Aust. sl.) a stupid person. |
| dufus | a fool. |
| dullard | a dolt. |
| dumb | stupid (verb) to make dumb |
| dumbhead | a fool. |
| dumbo | (Coll.) a dimwit > DUMBOS. |
| dumbshit | (Sl.) a stupid person. |
| dummelhead | (Dial.) a stupid person. |
| dummkopf | (Ger.) a stupid person. |
| dunce | a person regarded as stupid. |
| duncedom | the realm or domain of dunces. |
| duncelike | like a dunce. |
| duncery | dullness; stupidity. |
| duncical | like a dunce. |
| duncish | somewhat like a dunce. |
| duncishly | (Adv.) DUNCISH, somewhat like a dunce. |
| dunderhead | a dunce; a numskull; a blockhead. |
| dunderheaded | of or like a dunderhead. |
| dunderheadism | being a dunderhead. |
| dunderpate | a dunce; a numskull; a blockhead. |
| dweeb | (US sl.) a fool, a nerd. |
| dweebish | like a dweeb, a fool, a nerd. |
| dweeby | like a dweeb. |
| eejit | (Coll.) an idiot. |
| etourdi | (Fr.) foolish, thoughtless (of a male). |
| etourdie | (Fr.) foolish, thoughtless (of a female). |
| fadaise | (Fr.) an obvious or silly remark. |
| fatbrained | (Shakesp.) stupid. |
| fathead | a dolt. |
| fatheaded | stupid. |
| fatheadedly | (Adv.) FATHEADED, stupid. |
| fatheadedness | the state of being fatheaded. |
| fatuitous | stupid, fatuous. |
| fatuity | weakness or imbecility of mind. |
| fatuous | silly; purposeless. |
| fatuously | (Adv.) FATUOUS, silly; purposeless. |
| fatuousness | the state of being fatuous. |
| featherbrain | a foolish scatterbrained person. |
| featherbrained | foolish. |
| featherhead | an empty-headed person. |
| featherheaded | foolish, empty-headed. |
| feebleminded | mentally deficient. |
| feeblemindedly | (Adv.) FEEBLEMINDED, mentally deficient. |
| fon | (Obs.) a fool (verb) to fool, be foolish |
| fonly | foolishly, fondly. |
| fool | a person lacking in wisdom, judgement or sense; (verb) to deceive. |
| foolbegged | (Shakesp.) foolish enough to be begged for a fool (in allusion to the custom of seeking the administration of a lunatic's estate as one's own). |
| foolery | the practice of folly; the behavior of a fool. |
| foolish | silly. |
| foolishly | (Adv.) FOOLISH, silly. |
| foolishness | the state of being foolish. |
| footle | to speak or act foolishly. |
| footler | one who footles. |
| fuckface | a contemptibly stupid person. |
| fuckhead | a contemptibly stupid person. |
| fuckwit | a very stupid person. |
| gaby | (Dial.) a simpleton. |
| ganderism | foolish behaviour, as suited to a gander. |
| gaumless | (Scots) stupid; witless; vacant. |
| gaupus | (Dial.) a silly person. |
| gawmoge | a clownish person. |
| gawpus | (Dial.) a silly person. |
| git | a stupid person; (verb) to get. |
| glaiket | (Scots) giddy, foolish. |
| glaiketness | the quality of being glaiket, giddy, foolish. |
| glaikit | (Scots) giddy, foolish. |
| glaikitness | the quality of being glaikit, giddy, foolish. |
| gobshite | (Vulg.) a fool. |
| gomeral | (Scots) a simpleton. |
| gomerel | (Scots) a simpleton. |
| gomeril | (Scots) a simpleton. |
| goofily | (Adv.) GOOFY, foolish. |
| goofiness | the state of being goofy. |
| goofus | a foolish or stupid person. |
| goofy | foolish, stupid; (of teeth) protruding. |
| goop | a fool, a fatuous person. |
| goosey | a goose, a blockhead. |
| goosiness | the state of being goosy, simpleminded. |
| goosy | like a goose (noun) a goose, a blockhead |
| gormless | stupid, witless, vacant. |
| gouk | (Scots) a cuckoo; a fool, an April fool. |
| gowk | (Scots) a cuckoo, a fool. |
| gullish | foolish; stupid. |
| gump | a complete nitwit; (verb) to catch fish with the bare hands, to guddle. |
| gunsel | (US sl.) a stupid youth; a gunman. |
| halfwit | an idiot. |
| halfwitted | feebleminded. |
| halfwittedly | (Adv.) HALFWITTED, feebleminded. |
| halfwittedness | the state of being halfwitted. |
| haverel | (Scots) a foolish person. |
| hawbuck | a bumpkin. |
| hayseed | a country bumpkin. |
| hick | characteristic of rural people (noun) a person from the country, a yokel |
| hickish | like a hick, rustic. |
| hillbilly | a simple rustic, a yokel. |
| himbo | a male bimbo. |
| hobbish | clownish. |
| humdrum | a stupid fellow; monotony. |
| idiocy | the state of being an idiot. |
| idiot | a mentally deficient person. |
| idiotcy | the state of being an idiot. |
| idiotic | relating to or like an idiot. |
| idiotical | relating to or like an idiot. |
| idiotically | (Adv.) IDIOTICAL, common; simple. |
| idioticalness | the state of being idiotical. |
| idiotish | like an idiot. |
| ignaro | (Arch.) an ignorant person. |
| ignoramus | an ignorant person. |
| ignorant | not knowing things (noun) an ignorant person |
| ignorantly | (Adv.) IGNORANT, not knowing. |
| imbecile | feebleminded (noun) a mentally deficient person |
| imbecilely | (Adv.) IMBECILE, mentally deficient. |
| imbecilic | like an imbecile. |
| imbecilically | (Adv.) IMBECILIC, like an imbecile. |
| imbecility | the state of being an imbecile. |
| ingram | (Obs.) ignorant; (noun) an ignorant person. |
| ingrum | (Obs.) ignorant; (noun) an ignorant person. |
| insipience | (Arch.) a lack of intelligence. |
| insipient | wanting wisdom; foolish. |
| insipiently | (Adv.) INSIPIENT, wanting wisdom; foolish. |
| insulse | lacking wit, dull. |
| insulsity | stupidity. |
| jaap | (S. Afr.) a simpleton or country bumpkin. |
| jackassery | being a jackass. |
| jobernowl | a stupid person. |
| jolterhead | (Arch.) a clumsy oaf, a blockhead. |
| jolthead | (Arch.) a clumsy oaf, a blockhead. |
| joskin | (Sl.) a clown, yokel. |
| juggins | a simpleton. |
| jughead | an idiot, a fool. |
| kerky | stupid. |
| knobhead | (Sl.) a stupid person. |
| knothead | a stupid person. |
| knucklehead | a chump. |
| knuckleheaded | of or like a knucklehead. |
| lamebrain | an unintelligent person. |
| lamebrained | unintelligent. |
| loggerheaded | like a loggerhead or dunce. |
| looby | awkward, lubberly; (noun) a foolish person. |
| lummox | a fat, ungainly, stupid person. |
| lunk | a stupid person. |
| lunkhead | a fool, a blockhead. |
| lunkheaded | stupid, like a lunkhead. |
| maffled | (Coll.) mentally confused. |
| mafflin | a simpleton. |
| maffling | a simpleton. |
| mampara | (S. Afr.) a foolish person, an idiot. |
| meathead | (US sl.) a stupid person. |
| meathead | (US sl.) a stupid person. |
| meff | (dial.) a stupid or worthless person; a tramp. |
| mooncalf | a simpleton, a blockhead. |
| moonily | (Adv.) MOONY, dreamy. |
| moonstruck | simpleminded, as if affected by the moon. |
| moony | moonlit, dreamy (noun) a noodle |
| moria | (Greek) folly, foolishness. |
| moron | a mentally deficient person. |
| moronism | the condition of being a moron. |
| moronity | the condition of being a moron. |
| muddlehead | a muddled, confused, or foolish person. |
| muffish | stupid; awkward. |
| muggins | a fool, a sucker, esp used facetiously to refer to oneself as such. |
| muppet | (Coll.) a stupid person. |
| muttonhead | a heavy, stupid person. |
| nana | (Aust. sl.) an idiot, a fool. |
| nerk | a fool, an idiot. |
| niaiserie | (Fr.) simplicity; foolishness. |
| nickumpoop | a fool; a silly or stupid person. |
| nicompoop | a fool; a silly or stupid person. |
| nincom | (Short for) nincompoop. |
| nincompoop | a fool; a silly or stupid person. |
| nincompoopery | the state of being a nincompoop. |
| nincum | (Short for) nincompoop. |
| ninny | a foolish person. |
| ninnyhammer | a ninny, a foolish person. |
| ninnyish | characteristic of a ninny; foolish. |
| nitwit | a stupid person. |
| nitwitted | stupid. |
| nitwittedness | the state of being nitwitted. |
| nitwittery | the state of being a nitwit. |
| noddy | easy to understand (noun) a simpleton |
| nong | (Aust. sl.) a fool, an idiot. |
| nonny | a silly fellow. |
| noodledom | the state of being a blockhead. |
| numbhead | a stupid person; dolt; blockhead. |
| numbnut | an idiot. |
| numbnuts | an idiot. |
| numbskull | a stupid person. |
| numbskulled | stupid, doltish. |
| numpkin | a stupid person. |
| numpty | (Scots) an idiot. |
| numskull | a stupid person. |
| numskulled | stupid; doltish. |
| oanshagh | (Irish) a foolish woman or girl. |
| obtuse | stupid. |
| obtusely | (Adv.) OBTUSE, stupid. |
| obtusity | obtuseness. |
| omadhaun | (Irish) a fool, idiot, simpleton. |
| outfool | to exceed in folly. |
| oxhead | a dolt, a blockhead. |
| patsy | a person who is ridiculed, deceived, blamed, or victimized. |
| peabrain | a stupid person. |
| pigsconce | a blockhead. |
| pillock | an idiot, a twit. |
| pinhead | the head of a pin; a stupid person. |
| pinheaded | stupid. |
| pinheadedness | the state of being pinheaded, stupid. |
| poopy | stupid or ineffectual. |
| prat | (Coll.) an idiot. |
| rattlebrain | a foolish and talkative person. |
| rube | (US sl.) a bumpkin, an easy mark. |
| rustic | of or like the country (noun) one who lives in the country |
| rustical | rustic (noun) a rustic |
| rustically | (Adv.) RUSTICAL, rustic. |
| rusticial | (Scott) rustic. |
| rusticise | to make rustic. |
| rusticity | a rustic manner; simplicity; rudeness. |
| rusticize | to make rustic. |
| rusticly | (Adv.) RUSTIC, countrified. |
| saphead | a weak-minded, stupid fellow. |
| sapheaded | dopy, weak-minded. |
| sawney | a fool, a simpleton. |
| schlemiel | (Yiddish) an unlucky or incompetent person who is often duped. |
| schlub | (Yiddish) a stupid or unattractive person. |
| schmo | (Yiddish) a stupid or boring person. |
| schmock | (Yiddish) a stupid or boring person. |
| schmoe | (Yiddish) a stupid or boring person. |
| schmuck | (Yiddish) a pitiful, stupid or obnoxious person; (verb) to hit or flatten. |
| schmucky | acting like a schmuck, foolish, contemptible. |
| shithead | a stupid person. |
| shlub | (Yiddish) a stupid or unattractive person. |
| shmo | (Yiddish) a stupid or boring person. |
| shmock | (Yiddish) a stupid or boring person. |
| shmoe | (Yiddish) a stupid or boring person. |
| shmuck | (Yiddish) a pitiful, stupid or obnoxious person. |
| sillily | (Adv.) SILLY, foolish. |
| silliness | the state of being silly. |
| silly | foolish (noun) a silly person |
| simp | (Short for) a simpleton. |
| simpleton | a feebleminded person. |
| slabberer | one who slabbers, or drools; hence, an idiot. |
| softhead | a simpleton. |
| softheaded | having or indicative of a weak, unrealistic, or uncritical mind. |
| softheadedly | (Adv.) SOFTHEADED, having or indicative of a weak, unrealistic, or uncritical mind. |
| staumrel | a dolt. |
| stockish | like a stock; stupid. |
| stockishly | (Adv.) STOCKISH, like a stock; stupid. |
| stupid | foolish (noun) a stupid person |
| stupidity | the quality of being stupid. |
| stupidly | (Adv.) STUPID, foolish. |
| stupidness | the state of being stupid. |
| sumph | (Scots) a dunce, a blockhead. |
| sumphish | (Scots) stupid, doltish. |
| sumphishness | the state of being sumphish, stupid. |
| taupie | (Scots) a foolish or awkward young person. |
| tawpie | (Scots) a foolish or awkward young person. |
| thickhead | a thickheaded or stupid person; any bird of an Australian family related to flycatchers. |
| thickheaded | stupid. |
| thickheadedness | the state of being thickheaded. |
| thickie | a stupid person. |
| thicko | (Coll.) a stupid person. |
| thicky | a stupid person. |
| thimblewit | a silly or dimwitted person; a dunce. |
| thimblewitted | silly, dimwitted. |
| tomfoolish | foolish. |
| tomfoolishness | the state of being tomfoolish. |
| tony | high-toned (noun, obs.) a simpleton |
| tumphy | (Scots) a blockhead; coaly fireclay. |
| twerp | a foolish person. |
| twerpy | like a twerp, a foolish person. |
| twinkie | (Tradename) a stereotypically brainless person. |
| twinky | (Tradename) a stereotypically brainless person. |
| twirp | a foolish person. |
| twirpy | like a twirp, a foolish person. |
| twittingly | (Adv.) TWITTING. |
| twittish | silly, foolish. |
| twp | (Welsh) dimwitted or stupid. |
| underwit | inferior wit; halfwit. |
| unwise | not wise. |
| unwisely | (Adv.) UNWISE, not wise. |
| unwiseness | the state of being unwise. |
| wallie | an idiot or imbecile. |
| wally | (Scots) fine, excellent (noun) an idiot or imbecile |
| witless | lacking intelligence. |
| witlessly | (Adv.) WITLESS, lacking intelligence. |
| witlessness | the state of being witless. |
| wittol | (Arch.) a husband who accepts his wife's infidelity. |
| wittolly | (Shakesp.) like a wittol, a husband who accepts his wife's infidelity. |
| wof | (Aust. sl.) a fool, idiot. |
| wommit | a foolish person. |
| woodenhead | (Coll.) a blockhead, a stupid person. |
| woodenheaded | having a wooden head; dense, stupid. |
| woodentop | a uniformed policeman, a dimwit. |
| woollyback | (Coll.) a country bumpkin. |
| yampy | (Dial.) a foolish person. |
| yokel | a country bumpkin. |
| yokelish | like a yokel. |