allosaurus vs theropod

allosaurus and theropod both are nouns.

Word	Noun	Adjective	Verb	Adverb
allosaurus	Yes	No	No	No
theropod	Yes	No	No	No

As nouns, theropod is a hypernym of allosaurus; that is, theropod is a word with a broader meaning than allosaurus:

allosaurus: late Jurassic carnivorous dinosaur; similar to but somewhat smaller than tyrannosaurus
theropod: any of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legs

Other hypernyms of allosaurus include bird-footed dinosaur, theropod dinosaur.

allosaurus (noun)	theropod (noun)
late Jurassic carnivorous dinosaur; similar to but somewhat smaller than tyrannosaurus	any of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legs