zoological science vs univalve

zoological science and univalve both are nouns.

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

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

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