cherrystone clam vs round clam

cherrystone clam and round clam both are nouns.

Word	Noun	Adjective	Verb	Adverb
cherrystone clam	Yes	No	No	No
round clam	Yes	No	No	No

As nouns, round clam is a hypernym of cherrystone clam; that is, round clam is a word with a broader meaning than cherrystone clam:

cherrystone clam: a half-grown quahog
round clam: an edible American clam; the heavy shells were used as money by some American Indians

Other hypernyms of cherrystone clam include hard-shell clam, hard clam, Mercenaria mercenaria, quahaug, quahog, Venus mercenaria.

As nouns, round clam is a hypernym of cherrystone clam; that is, round clam is a word with a broader meaning than cherrystone clam:

cherrystone clam: small quahog larger than a littleneck; eaten raw or cooked as in e.g. clams casino
round clam: Atlantic coast round clams with hard shells; large clams usually used for chowders or other clam dishes

Other hypernyms of cherrystone clam include hard-shell clam, quahaug, quahog.

cherrystone clam (noun)	round clam (noun)
a half-grown quahog	an edible American clam; the heavy shells were used as money by some American Indians
small quahog larger than a littleneck; eaten raw or cooked as in e.g. clams casino	Atlantic coast round clams with hard shells; large clams usually used for chowders or other clam dishes