univalve vs zoological science

univalve and zoological science both are nouns.

Word	Noun	Adjective	Verb	Adverb
univalve	Yes	Yes	No	No
zoological science	Yes	No	No	No

univalve (noun)	zoological science (noun)
a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes	the branch of biology that studies animals

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