herrerasaurus vs theropod

herrerasaurus and theropod both are nouns.

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

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

herrerasaurus: a kind of theropod dinosaur found in Argentina
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 herrerasaurus include bird-footed dinosaur, theropod dinosaur.

herrerasaurus (noun)	theropod (noun)
a kind of theropod dinosaur found in Argentina	any of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legs