sponge morel vs morel

sponge morel and morel both are nouns.

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

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

sponge morel: an edible and choice morel with a globular to elongate head with an irregular pattern of pits and ridges
morel: any of various edible mushrooms of the genus Morchella having a brownish spongelike cap

sponge morel (noun)	morel (noun)
an edible and choice morel with a globular to elongate head with an irregular pattern of pits and ridges	any of various edible mushrooms of the genus Morchella having a brownish spongelike cap