black morel vs morel

black morel and morel both are nouns.

Word	Noun	Adjective	Verb	Adverb
black morel	Yes	No	No	No
morel	Yes	No	No	No

As nouns, morel is a hypernym of black morel; that is, morel is a word with a broader meaning than black morel:

black morel: a morel whose pitted fertile body is attached to the stalk with little free skirt around it; the fertile body is grey when young and black in old age
morel: any of various edible mushrooms of the genus Morchella having a brownish spongelike cap

black morel (noun)	morel (noun)
a morel whose pitted fertile body is attached to the stalk with little free skirt around it; the fertile body is grey when young and black in old age	any of various edible mushrooms of the genus Morchella having a brownish spongelike cap