pelecypod vs lamellibranch

pelecypod and lamellibranch both are nouns.

Word	Noun	Adjective	Verb	Adverb
pelecypod	Yes	Yes	No	No
lamellibranch	Yes	Yes	No	No

As adjectives, pelecypod and lamellibranch are synonyms defined as:

Other synonyms of pelecypod include pelecypodous.

As nouns, pelecypod and lamellibranch are synonyms defined as:

pelecypod and lamellibranch: marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together

Other synonyms of pelecypod include bivalve.

pelecypod (noun)	lamellibranch (noun)
marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together	marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together

pelecypod (adjective)	lamellibranch (adjective)
bivalve	bivalve