earth-closet vs outhouse

earth-closet and outhouse both are nouns.

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

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

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

Other synonyms of earth-closet include jakes, privy.

earth-closet (noun)	outhouse (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