The 4 letter words with definitions, separated alphabetically.
Now updated for CSW24. New words, if any, and new inflections of existing words, are shown in red.
| oafs | (Pl.) OAF, a clumsy person. |
| oaks | (Pl.) OAK, a genus of trees of the beech family. |
| oaky | Oak-like > OAKIER, OAKIEST; (noun) an ice-cream > OAKIES. |
| oars | (3rd.) OAR, to row a boat. |
| oary | Having the form of or using oars > OARIER, OARIEST. |
| oast | A kiln to dry hops or malt > OASTS. |
| oath | A formal declaration or promise to fulfill a pledge > OATHS. |
| oats | (Pl.) OAT, a genus of grasses. |
| oaty | Like oats > OATIER, OATIEST. |
| obas | (Pl.) OBA, a West African chief. |
| obes | (Pl.) OBE, West Indian witchcraft. |
| obey | To follow the commands or guidance of > OBEYS, OBEYING, OBEYED. |
| obia | West Indian witchcraft > OBIAS. Also OBI, OBEAH. |
| obis | (3rd.) OBI, to bewitch. |
| obit | (Lat.) a religious office for a dead person > OBITS. |
| oboe | A double-reed treble woodwind instrument > OBOES. |
| obol | (Greek) a Greek coin > OBOLS. Also OBOLUS. |
| obos | (Pl.) OBO, a vessel for carrying oil or bulk ore. |
| obvs | (Coll.) obviously. |
| ocas | (Pl.) OCA, a S. American wood-sorrel. |
| occy | As in all over the OCCY, in every direction > OCCIES. |
| oche | The throwing line in darts > OCHES. |
| octa | A unit of cloud-cover, one-eighth sky > OCTAS. Also OKTA. |
| odah | (Turkish) a room in a harem > ODAHS. Also ODA. |
| odal | (Orkneys) allodial, without feudal superior; (noun) an estate so held > ODALS. Also UDAL. |
| odas | (Pl.) ODA, a room in a harem. |
| odds | (Pl.) ODD, in golf, an additional or allowed stroke. |
| odea | (Pl.) ODEUM, a building for the performance of vocal and instrumental music. |
| odes | (Pl.) ODE, an elaborate lyric addressed to someone or something. |
| odic | Of or pertaining to an ODE. |
| odor | Any smell, whether fragrant or offensive > ODORS, ODORED. Also ODOUR. |
| odso | (Obs.) an interjection expressing surprise > ODSOS. Also GODSO, GADSO. |
| odyl | = OD, the vital force > ODYLS. Also ODYLE. |
| offa | off, off from. |
| offs | (3rd.) OFF, to go off. |
| offy | (Sl.) an off-licence > OFFIES. |
| ogam | (Irish) a 6th C. Irish writing alphabet > OGAMS. Also OGHAM. |
| ogee | A curve or molding like integral sign; arch of two curves meeting at a point > OGEES. |
| ogle | To stare at > OGLES, OGLING, OGLED. |
| ogre | A cannibalistic giant > OGRES. |
| ohed | (Pt.) OH, to say OH. |
| ohia | (Hawaiian) a Polynesian tree of the myrtle family with bright red flowers, aka LEHUA > OHIAS. |
| ohms | (Pl.) OHM, a unit of electrical resistance. |
| oiks | (Pl.) OIK, an inferior person, a lout. |
| oils | (3rd.) OIL, to smear or lubricate with oil. |
| oily | Like oil > OILIER, OILIEST; OILILY. |
| oink | To make a noise like a pig > OINKS, OINKING, OINKED. |
| oint | To anoint > OINTS, OINTING, OINTED. |
| okas | (Pl.) OKA, a Turkish weight. |
| okay | (Verb) to approve, pass as OK > OKAYS, OKAYING, OKAYED. |
| okeh | Expressing approval > OKEHS. |
| okes | (Pl.) OKE, a Turkish weight. |
| okra | A tropical plant of the mallow family, with edible pods, aka GUMBO > OKRAS. |
| okta | A unit of cloud-cover, one-eighth sky > OKTAS. Also OCTA. |
| olde | A facetious word for old. |
| olds | (Pl.) OLD, an old person. |
| oldy | (Coll.) an old person or thing > OLDIES. Also OLDIE. |
| olea | (Pl.) OLEUM, fuming sulphuric acid. |
| oleo | (Abbr.) OLEOGRAPH, a lithographic reproduction of an oil painting > OLEOS. |
| oles | (Pl.) OLE, a shout of approval. |
| olid | Rank-smelling. |
| olio | A savoury dish of meat and vegetables > OLIOS. |
| olla | (Spanish) a jar or urn > OLLAS. [Sp. olla, pot]. |
| olms | (Pl.) OLM, a blind salamander. |
| olpe | (Greek) a Greek jug > OLPES or OLPAE. |
| omas | (Pl.) OMA, a grandmother. |
| ombu | (Guarani) a S. American tree, that grows in the pampas > OMBUS. |
| omen | (Verb) to portend > OMENS, OMENING, OMENED. |
| omer | (Hebrew) a Hebrew dry measure, = 1/10 EPHA > OMERS. |
| omit | To leave out > OMITS, OMITTING, OMITTED. |
| omov | One man one vote > OMOVS. |
| once | (Noun) one time > ONCES. |
| oner | Something that is one of its kind > ONERS. Also WUNNER. |
| ones | (Pl.) ONE, an individual thing or person. |
| onie | (Scots) any. Also ONY. |
| only | Sole, alone > ONLIEST but not ONLIER*. |
| onos | (Pl.) ONO, a kind of fish. |
| onst | (Dial.) once. |
| onto | To a position upon. |
| onus | (Lat.) a burden > ONUSES. |
| onyx | A form of chalcedony consisting of plane layers of different colours, much used for cameos > ONYXES. |
| oofs | (Pl.) OOF, money. |
| oofy | Having OOF or money > OOFIER, OOFIEST. |
| oohs | (3rd.) OOH, to say OOH. |
| ooms | (Pl.) OOM, uncle. |
| oons | An oath, God's wounds. |
| oont | (Hindi) a camel > OONTS. |
| oops | (3rd.) OOP, to bind with thread, join. |
| oose | (Scots) fluff, nap > OOSES. |
| oosy | (Scots) fluffy > OOSIER, OOSIEST. |
| oots | (Pl.) OOT, out. |
| ooze | To flow or leak out slowly > OOZES, OOZING, OOZED. |
| oozy | Oozing > OOZIER, OOZIEST; OOZILY. |
| opah | A large sea-fish with laterally flattened body > OPAHS. Aka SUNFISH, KINGFISH. |
| opal | An amorphous variety of SILICA > OPALS, OPALED. |
| opas | (Pl.) OPA, a grandfather. |
| oped | (Pt.) OPE, to open. |
| open | Affording unobstructed access, passage, or view > OPENER, OPENEST; OPENLY; (verb) to cause to become open > OPENS, OPENING, OPENED. |
| opes | (3rd.) OPE, to open. |
| oppo | One's opposite number > a partner or opponent > OPPOS. |
| opts | (3rd.) OPT, to decide or choose. |
| opus | (Lat.) work, esp. an artistic or literary work > OPUSES or OPERA. |
| orad | Towards the mouth. |
| oral | Relating to the mouth; uttered by the mouth > ORALLY; (noun) an oral examination > ORALS. |
| orbs | (3rd.) ORB, to surround, to form into an orb. |
| orby | Orbed > ORBIER, ORBIEST. |
| orca | The killer whale > ORCAS. Also ORC. |
| orcs | (Pl.) ORC, a killer whale. |
| ordo | An annual religious calendar with instructions for Mass and office for each day > ORDINES or ORDOS. |
| ords | (Pl.) ORD, a point e.g. of a weapon. |
| ores | (Pl.) ORE, a solid mineral aggregate. |
| orfe | (Ger.) a kind of carp > ORFES. |
| orfs | (Pl.) ORF, a viral infection of sheep. |
| orgs | (Pl.) ORG, an organization. |
| orgy | A party marked by unrestrained sexual indulgence > ORGIES. |
| orle | A border within a shield at a short distance from the edge > ORLES. |
| orra | (Scots) odd, not matched. An ORRA MAN is a farmworker kept to do any odd job that may arise. |
| orts | (Pl.) ORT, a morsel left at a meal. |
| oryx | A kind of antelope > ORYXES. |
| orzo | (Ital.) pasta in the form of small pieces like barley > ORZOS. |
| osar | (Pl.) OS, an esker. |
| oses | (Pl.) OSE, an esker. |
| ossa | (Pl.) OS, bone. |
| otic | Pertaining to the ear. |
| otto | (Persian) a fragrant essential oil made from the damask rose > OTTOS. Also OTTAR, ATTAR. |
| ouch | An interjection expressing pain; (noun) a socket in which a precious stone is set; (verb) to set a precious stone in a socket > OUCHES, OUCHING, OUCHED. |
| ouds | (Pl.) OUD, an African lute. |
| ouks | (Pl.) OUK, Scots for week. |
| ould | (Irish) old > OULDER, OULDEST. |
| oulk | (Scots) week > OULKS. Also OUK. |
| ouma | (Afrikaans) a grandmother > OUMAS. |
| oupa | (Afrikaans) a grandfather > OUPAS. |
| ouph | (Shakesp.) an oaf > OUPHS. Also OUPHE. |
| oups | (3rd.) OUP, to bind with thread. |
| ourn | (Dial.) ours. |
| ours | A possessive form of the pronoun WE. |
| oust | To expel or remove from a position or place > OUSTS, OUSTING, OUSTED. |
| outa | an informal contraction of out of. |
| outs | (3rd.) OUT, to put or throw out. |
| ouzo | (Mod. Gr.) an aniseed-flavored Greek liqueur > OUZOS. |
| oval | Egg-shaped > OVALLY; (noun) an oval (egg-shaped) figure or object > OVALS. |
| ovel | (Hebrew) a mourner esp during the first seven days after a death > OVELS. Also AVEL. |
| oven | An enclosed compartment in which substances are heated; (verb) to cook in an oven > OVENS, OVENING, OVENED. |
| over | (Verb) to go, leap or vault over > OVERS, OVERING, OVERED. |
| ovum | The female reproductive cell > OVA. |
| owed | (Pt.) OWE, to be in debt for. |
| ower | (Scots) over. |
| owes | (3rd.) OWE, to be in debt for. |
| owie | An injry that is not serious > OWIES. |
| owls | (3rd.) OWL, to smuggle esp. wool. |
| owly | Owlish > OWLIER, OWLIEST. |
| owns | (3rd.) OWN, to possess. |
| owre | (Spenser) ore > OWRES. |
| owse | (Scots) an ox > OWSEN. |
| owts | (Pl.) OWT, anything. |
| oxen | (Pl.) OX. |
| oxer | In foxhunting, an ox-fence > OXERS. |
| oxes | (Pl.) OX, in sense of a clumsy person. |
| oxic | denoting a process involving oxygen. |
| oxid | A compound containing oxygen. Also OXIDE. |
| oxim | Any of a number of compounds obtained by the action of hydroxylamine on aldehydes or ketones that contain a bivalent group (=NOH) attached to a carbon atom > OXIMS. Also OXIME. |
| oyer | A hearing or an inspection, as of a deed, bond, etc., as when a defendant in court prays oyer of a writing > OYERS. |
| oyes | The call of a public crier for attention before making a proclamation > OYESES or OYESSES. Also OYEZ. |
| oyez | The call of a public crier for attention before making a proclamation. Pl. OYEZES. Also OYES. |