cockle vs edible cockle

cockle and edible cockle both are nouns.

Word	Noun	Adjective	Verb	Adverb
cockle	Yes	No	Yes	No
edible cockle	Yes	No	No	No

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

cockle: common edible, burrowing European bivalve mollusk that has a strong, rounded shell with radiating ribs
edible cockle: common edible European cockle

Other hyponyms of cockle include Cardium edule.

cockle (noun)	edible cockle (noun)
common edible, burrowing European bivalve mollusk that has a strong, rounded shell with radiating ribs	common edible European cockle
common edible European bivalve

cockle (verb)	edible cockle (verb)
to gather something into small wrinkles or folds
stir up (water) so as to form ripples