Morchella esculenta vs sponge mushroom

Morchella esculenta and sponge mushroom both are nouns.

Word	Noun	Adjective	Verb	Adverb
Morchella esculenta	Yes	No	No	No
sponge mushroom	Yes	No	No	No

As nouns, Morchella esculenta and sponge mushroom are synonyms defined as:

Morchella esculenta and sponge mushroom: an edible and choice morel with a globular to elongate head with an irregular pattern of pits and ridges

Other synonyms of Morchella esculenta include common morel, sponge morel.

Morchella esculenta (noun)	sponge mushroom (noun)
an edible and choice morel with a globular to elongate head with an irregular pattern of pits and ridges	an edible and choice morel with a globular to elongate head with an irregular pattern of pits and ridges