bivalve vs zoology

bivalve and zoology both are nouns.

Word	Noun	Adjective	Verb	Adverb
bivalve	Yes	Yes	No	No
zoology	Yes	No	No	No

bivalve (noun)	zoology (noun)
marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together	the branch of biology that studies animals
	all the animal life in a particular region or period

bivalve (adjective)	zoology (adjective)
used of mollusks having two shells (as clams etc.)