sanatarium vs sanatorium

sanatarium and sanatorium both are nouns.

Word	Noun	Adjective	Verb	Adverb
sanatarium	Yes	No	No	No
sanatorium	Yes	No	No	No

As nouns, sanatarium and sanatorium are synonyms defined as:

sanatarium and sanatorium: a hospital for recuperation or for the treatment of chronic diseases

Other synonyms of sanatarium include sanitarium.

sanatarium (noun)	sanatorium (noun)
a hospital for recuperation or for the treatment of chronic diseases	a hospital for recuperation or for the treatment of chronic diseases
	pejorative terms for an insane asylum