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Now updated for CSW15. New words, if any, and new inflections of existing words, are shown in red.


allosaur a large, lizard-hipped carnivorous dinosaur.
allosaurus a kind of dinosaur.
ankylosaur a kind of dinosaur with a club tail.
ankylosaurus a kind of dinosaur with a club tail.
apatosaur a long-necked dinosaur.
apatosaurus a kind of dinosaur.
archaeopteryx a Jurassic fossil bird of the Archaeopteryx genus, with a long bony tail, sharp-toothed jaws, and wings bearing three clawed digits.
archaeornis a primitive reptile-like fossil bird.
archosaur any of a subclass of reptiles comprising pterosaurs, dinosaurs and crocodilians.
archosaurian relating to archosaur, any of a subclass of reptiles comprising pterosaurs, dinosaurs and crocodilians.
barosaur a large dinosaur.
brachiosaurus any member of a genus of huge lizard-hipped plant-eating dinosaurs.
brontosaur any of a genus of large sauropod dinosaurs of the Jurassic.
brontosaurus any of a genus of large sauropod dinosaurs of the Jurassic.
carnosaur a meat-eating dinosaur.
ceratopsian a bird-hipped, plant-eating dinosaur of the late Cretaceous.
ceratopsid a bird-hipped, plant-eating dinosaur of the late Cretaceous.
ceteosaurus a large Jurassic dinosaur.
chalicothere an extinct three-toed ungulate.
coelurosaur a bipedal carnivorous dinosaur of the Triassic and Cretaceous periods.
cotylosaur an extinct primitive reptile with massive body and short legs.
creodont any member of a group of primitive fossil carnivores, appearing in Eocene times.
cynodont a carnivorous mammal-like reptile of the late Permian and Triassic.
deinonychus any of a genus of small bipedal carnivorous theropod dinosaurs from the Cretaceous.
deinosaur any of a group of extinct reptiles.
deinothere an extinct elephantine mammal with downward-curving tusks.
deinotherium an extinct elephantine mammal with downward-curving tusks.
dicynodont a fossil reptile with no teeth except for two in the upper jaw.
dino (Short for) a dinosaur.
dinosaur any of a group of extinct reptiles.
dinosaurian of or like a dinosaur.
dinosauric of or like a dinosaur.
dinothere an extinct elephantine mammal with downward-curving tusks.
dinotherium an extinct elephantine mammal with downward-curving tusks.
diplodocus a gigantic, quadruped, herbivorous dinosaur.
diprotodon any marsupial of the Diprotodontia, that includes kangaroos, wombats, etc.
diprotodontid an animal of the Diprotodontidae, an extinct family of marsupials including the genus Diprotodon.
dolichosaurus any member of the Dolichosauria, a group of Cretaceous fossil reptiles.
elasmosaur a very long-necked extinct marine reptile, a type of plesiosaur.
eohippus (Greek) an ancestor of the horse.
eurypterid any of an order of large extinct aquatic Paleozoic arthropods related to the horsehoe crab.
eurypteroid like a member of the Eurypterida, a fossil order of scorpion-like aquatic animals; (noun) a eurypterid.
fusulinid any of a family of extinct marine foraminifera.
glyptodont any of a family of extinct S. American edentates.
hadrosaur a bird-hipped dinosaur of the Cretaceous.
hadrosaurus a large dinosaur.
ichthyosaur a large fossil marine reptile.
ichthyosaurian a large fossil marine reptile.
ichthyosaurus a large fossil marine reptile.
iguanodon a kind of dinosaur.
labyrinthodont an extinct amphibian, so called from a mazy pattern on a section of its teeth.
machairodont a sabre-toothed animal.
maiasaur a species of dinosaur.
maiasaura a species of dinosaur.
mastodon a large extinct mammal resembling the elephant.
mastodonic of or like a mastodon.
mastodont a large extinct mammal resembling the elephant.
mastodontic of or like a mastodon.
megalodon an extinct giant shark of the Cenozoic era.
megalosaur a large dinosaur.
megalosaurian a large dinosaur.
megalosaurus a large dinosaur.
mesohippus an extinct mammal of the Horse family.
mesosaur an extinct aquatic reptile.
mosasaurus a gigantic Cretaceous fossil pythonomorph reptile.
mylodon (Greek) an extinct genus of large slothlike American edentates.
mylodont (Greek) an extinct genus of large slothlike American edentates.
nototherium an extinct Pleistocene rhinoceros-sized marsupial of the genus Nototherium, related to the wombats.
notoungulate any one of an extinct group of herbivorous, hoofed mammals common in S. America between the Palaeocene and Pleistocene eras.
notungulate any one of an extinct group of herbivorous, hoofed mammals.
odontornithes fossil birds with teeth (not a natural class).
oreodont an extinct prehistoric mammal.
ornithischian any of an order of herbivorous dinosaurs.
ornithopod a member of a suborder of bipedal ornithischian (bird-hipped) dinosaurs.
ornithosaur a pterodactyl.
ostracoderm any of the early fossil jawless fishes of the Lower Paleozoic usually having a bony covering of plates or scales.
oviraptor a small two-footed dinosaur.
paradoxidian belonging to the Paradoxides, a Middle Cambrian genus of trilobites.
pelycosaur a kind of dinosaur.
pithecanthropus any of several primitive extinct men from Java.
plesiosaur any of a group of extinct marine reptiles of Mesozoic times.
plesiosaurian of or like a plesiosaur, any of a group of extinct marine reptiles of Mesozoic times; (noun) a member of the reptile order Plesiosauria.
pliosaur a fossil marine reptile.
prosauropod a reptile-like dinosaur of the division Prosauropoda which lived in the Triassic period.
pteranodon a toothless flying reptile of the Cretaceous period with a hornlike crest.
pterodactyl any of various pterosaurs of the Late Jurassic and Cretaceous having a rudimentary tail and a beak with reduced dentition.
pterodactyle any of various pterosaurs of the Late Jurassic and Cretaceous having a rudimentary tail and a beak with reduced dentition.
pterosaur a pterodactyl.
pterosaurian a pterodactyl.
pythonomorph a large marine reptile of the Cretaceous period, with long, scaly body and paddle-shaped limbs.
saurischian any dinosaur of the Saurischia.
sauropod any gigantic herbivorous quadripedal dinosaur of the suborder Sauropoda.
sauropodous like a sauropod.
sauropterygian belonging to the Sauropterygia, an order of fossil reptiles; (noun) any carnivorous Mesozoic marine reptile of the group Sauropterygia, with paddle-like limbs.
smilodon an extinct genus of saber-toothed tigers.
stegocephalian any member of the Stegocephalia, an extinct order of amphibians having the skull protected by bony plates.
stegodon an extinct mammal with ridged teeth.
stegodont an extinct mammal with ridged teeth.
stegosaur a herbivorous dinosaur of the Jurassic period.
stegosaurian any quadrupedal herbivorous ornithischian dinosaur of the suborder Stegosauria.
stegosaurus a kind of dinosaur.
supersaur a very large dinosaur.
teleosaur an extinct marine crocodile, having a slender snout and short front legs.
teleosaurian a teleosaur, a member of a Jurassic genus of fossil crocodiles.
thecodont a member of the order Thecodontia of archosaurian reptiles with teeth fixed in sockets in the jawbone.
therapsid one of a group of Permian and Jurassic reptiles considered to be direct ancestors of mammals.
theropod a carnivorous dinosaur with small forelimbs (eg tyrannosaurus).
theropodan a carnivorous dinosaur with small forelimbs (eg a tyrannosaurus).
tichorrhine a fossil woolly rhinoceros with a bony nasal septum.
titanis an ostrichlike prehistoric N. American bird.
titanosaur a very large dinosaur.
titanothere any of various very large extinct horselike perissodactyl mammals.
triceratops a kind of dinosaur.
tyrannosaur a large carnivorous lizard-hipped dinosaur, common during the Cretaceous period.
tyrannosaurus a large carnivorous lizard-hipped dinosaur, common during the Cretaceous period.
velociraptor a small bipedal Cretaceous dinosaur with a long narrow head and a sickle-like claw on each hind foot.