outhouse vs earth-closet

outhouse and earth-closet both are nouns.

Word	Noun	Adjective	Verb	Adverb
outhouse	Yes	No	No	No
earth-closet	Yes	No	No	No

As nouns, outhouse and earth-closet are synonyms defined as:

outhouse and earth-closet: a small outbuilding with a bench having holes through which a user can defecate

Other synonyms of outhouse include jakes, privy.

outhouse (noun)	earth-closet (noun)
a small outbuilding with a bench having holes through which a user can defecate	a small outbuilding with a bench having holes through which a user can defecate