hard-skinned puffball vs earthball

hard-skinned puffball and earthball both are nouns.

Word	Noun	Adjective	Verb	Adverb
hard-skinned puffball	Yes	No	No	No
earthball	Yes	No	No	No

As nouns, hard-skinned puffball and earthball are synonyms defined as:

hard-skinned puffball and earthball: any of various fungi of the genus Scleroderma having hard-skinned subterranean fruiting bodies resembling truffles

Other synonyms of hard-skinned puffball include false truffle, puffball.

hard-skinned puffball (noun)	earthball (noun)
any of various fungi of the genus Scleroderma having hard-skinned subterranean fruiting bodies resembling truffles	any of various fungi of the genus Scleroderma having hard-skinned subterranean fruiting bodies resembling truffles