soft-shelled crab vs crabmeat

soft-shelled crab and crabmeat both are nouns.

Word	Noun	Adjective	Verb	Adverb
soft-shelled crab	Yes	No	No	No
crabmeat	Yes	No	No	No

As nouns, crabmeat is a hypernym of soft-shelled crab; that is, crabmeat is a word with a broader meaning than soft-shelled crab:

soft-shelled crab: freshly molted crab with new shell still tender and flexible
crabmeat: the edible flesh of any of various crabs

Other hypernyms of soft-shelled crab include crab.

soft-shelled crab (noun)	crabmeat (noun)
edible crab that has recently molted and not yet formed its new shell	the edible flesh of any of various crabs
freshly molted crab with new shell still tender and flexible