List of 12-letter words containing

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There are 15 twelve-letter words containing OSAU

ALLOSAURUSES	• allosauruses n. Plural of allosaurus. • ALLOSAURUS n. a kind of dinosaur.
ANKYLOSAURUS	• ankylosaurus n. A large herbivorous dinosaur, of genus Ankylosaurus, that lived in the Cretaceous period, noted for… • Ankylosaurus prop.n. A taxonomic genus within the family Ankylosauridae – ankylosaurus, an armored dinosaur from the Cretaceous… • ANKYLOSAURUS n. a kind of dinosaur with a club tail, also ANKYLOSAUR.
ARCHOSAURIAN	• archosaurian n. An archosaur. • ARCHOSAURIAN n. any of a subclass of reptiles comprising pterosaurs, dinosaurs and crocodilians, also ARCHOSAUR.
BRACHIOSAURS	• brachiosaurs n. Plural of brachiosaur.
BRONTOSAURUS	• brontosaurus n. One of the largest land animals to ever walk the earth; a Brontosaurus. • Brontosaurus prop.n. A taxonomic genus within the family Diplodocidae – certain large long-necked sauropods; formerly merged… • BRONTOSAURUS n. any of a genus of large sauropod dinosaurs of the Jurassic, also BRONTOSAUR.
COELUROSAURS	• coelurosaurs n. Plural of coelurosaur. • COELUROSAUR n. a bipedal carnivorous dinosaur of the Triassic and Cretaceous periods.
ICHTHYOSAURI	• ichthyosauri n. Plural of ichthyosaur. • ICHTHYOSAURUS n. a large fossil marine reptile, also ICHTHYOSAUR, ICHTHYOSAURIAN.
ICHTHYOSAURS	• ichthyosaurs n. Plural of ichthyosaur. • ICHTHYOSAUR n. a large fossil marine reptile, also ICHTHYOSAURIAN, ICHTHYOSAURUS.
MEGALOSAURUS	• Megalosaurus prop.n. A taxonomic genus within the family Megalosauridae – a theropod dinosaur from the Jurassic of England. • MEGALOSAURUS n. a large dinosaur, also MEGALOSAUR, MEGALOSAURIAN.
ORNITHOSAURS	• ORNITHOSAUR n. a pterodactyl.
PROSAUROPODS	• prosauropods n. Plural of prosauropod. • PROSAUROPOD n. a reptile-like dinosaur of the division Prosauropoda which lived in the Triassic period.
PTEROSAURIAN	• pterosaurian adj. (Paleontology) Of or relating to the Pterosauria. • pterosaurian n. (Paleontology) Any of the Pterosauria; a pterosaur. • PTEROSAURIAN n. a pterodactyl, also PTEROSAUR.
STEGOSAURIAN	• stegosaurian n. Any dinosaur of the suborder Stegosauria. • STEGOSAURIAN n. any quadrupedal herbivorous ornithischian dinosaur of the suborder Stegosauria.
TELEOSAURIAN	• teleosaurian n. (Zoology) Any member of the genus Teleosaurus. • TELEOSAURIAN n. a teleosaur, a member of a Jurassic genus of fossil crocodiles.
TYRANNOSAURS	• tyrannosaurs n. Plural of tyrannosaur. • TYRANNOSAUR n. a large carnivorous lizard-hipped dinosaur, common during the Cretaceous period, also TYRANNOSAURUS.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the WikWik.org and 1Word.ws.

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English Wiktionary: 124 words
Scrabble in French: 10 words
Scrabble in Spanish: 2 words
Scrabble in Italian: 2 words
Scrabble in German: no word
Scrabble in Romanian: no word

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