earthball vs puffball

earthball and puffball both are nouns.

Word	Noun	Adjective	Verb	Adverb
earthball	Yes	No	No	No
puffball	Yes	No	No	No

As nouns, earthball and puffball are synonyms defined as:

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

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

earthball (noun)	puffball (noun)
any of various fungi of the genus Scleroderma having hard-skinned subterranean fruiting bodies resembling truffles	any of various fungi of the family Lycoperdaceae whose round fruiting body discharges a cloud of spores when mature
	any of various fungi of the genus Scleroderma having hard-skinned subterranean fruiting bodies resembling truffles