scallop vs bay scallop

scallop and bay scallop both are nouns.

Word	Noun	Adjective	Verb	Adverb
scallop	Yes	No	Yes	No
bay scallop	Yes	No	No	No

As nouns, bay scallop is a hyponym of scallop; that is, bay scallop is a word with a more specific, narrower meaning than scallop:

scallop: edible marine bivalve having a fluted fan-shaped shell that swim by expelling water from the shell in a series of snapping motions
bay scallop: a small scallop inhabiting shallow waters and mud flats of the Atlantic coast of North America

Other hyponyms of scallop include Pecten irradians, giant scallop, Pecten magellanicus, sea scallop.

As nouns, bay scallop is a hyponym of scallop; that is, bay scallop is a word with a more specific, narrower meaning than scallop:

scallop: edible muscle of mollusks having fan-shaped shells; served broiled or poached or in salads or cream sauces
bay scallop: muscle of small choice shallow-water scallops

Other hyponyms of scallop include sea scallop.

scallop (noun)	bay scallop (noun)
edible marine bivalve having a fluted fan-shaped shell that swim by expelling water from the shell in a series of snapping motions	a small scallop inhabiting shallow waters and mud flats of the Atlantic coast of North America
edible muscle of mollusks having fan-shaped shells; served broiled or poached or in salads or cream sauces	muscle of small choice shallow-water scallops
thin slice of meat (especially veal) usually fried or broiled
one of a series of rounded projections (or the notches between them) formed by curves along an edge (as the edge of a leaf or piece of cloth or the margin of a shell or a shriveled red blood cell observed in a hypertonic solution etc.)

scallop (verb)	bay scallop (verb)
shape or cut in scallops
fish for scallops
form scallops in
decorate an edge with scallops
bake in a sauce, milk, etc., often with breadcrumbs on top