Vertebrata vs amphibian genus

Vertebrata and amphibian genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Vertebrata	Yes	No	No	No
amphibian genus	Yes	No	No	No

Vertebrata (noun)	amphibian genus (noun)
fishes, amphibians, reptiles, birds, mammals	any genus of amphibians