Mya arenaria vs long-neck clam

Mya arenaria and long-neck clam both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mya arenaria	Yes	No	No	No
long-neck clam	Yes	No	No	No

As nouns, Mya arenaria and long-neck clam are synonyms defined as:

Mya arenaria and long-neck clam: an edible clam with thin oval-shaped shell found in coastal regions of the United States and Europe

Other synonyms of Mya arenaria include soft-shell clam, steamer, steamer clam.

Mya arenaria (noun)	long-neck clam (noun)
an edible clam with thin oval-shaped shell found in coastal regions of the United States and Europe	an edible clam with thin oval-shaped shell found in coastal regions of the United States and Europe
	a clam that is usually steamed in the shell