univalve vs Gastropoda

univalve and Gastropoda both are nouns.

Word	Noun	Adjective	Verb	Adverb
univalve	Yes	Yes	No	No
Gastropoda	Yes	No	No	No

univalve (noun)	Gastropoda (noun)
a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes	snails and slugs and their relatives

univalve (adjective)	Gastropoda (adjective)
used of mollusks, especially gastropods, as snails etc.