miter mushroom vs helvella

miter mushroom and helvella both are nouns.

Word	Noun	Adjective	Verb	Adverb
miter mushroom	Yes	No	No	No
helvella	Yes	No	No	No

As nouns, helvella is a hypernym of miter mushroom; that is, helvella is a word with a broader meaning than miter mushroom:

miter mushroom: a helvella with a saddle-shaped fertile part and creamy color; the stalk is fluted and pitted
helvella: any fungus of the genus Helvella having the ascocarps stalked or pleated or often in folds

miter mushroom (noun)	helvella (noun)
a helvella with a saddle-shaped fertile part and creamy color; the stalk is fluted and pitted	any fungus of the genus Helvella having the ascocarps stalked or pleated or often in folds