cherrystone vs Venus mercenaria

cherrystone and Venus mercenaria both are nouns.

Word	Noun	Adjective	Verb	Adverb
cherrystone	Yes	No	No	No
Venus mercenaria	Yes	No	No	No

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

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

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

cherrystone (noun)	Venus mercenaria (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