Now updated for CSW19. 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 archosaurian | 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. |