Lamellibranchia vs Bivalvia

Lamellibranchia and Bivalvia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lamellibranchia	Yes	No	No	No
Bivalvia	Yes	No	No	No

As nouns, Lamellibranchia and Bivalvia are synonyms defined as:

Other synonyms of Lamellibranchia include class Bivalvia, class Lamellibranchia, class Pelecypoda.

Lamellibranchia (noun)	Bivalvia (noun)
oysters, clams, scallops, mussels	oysters, clams, scallops, mussels