sanatarium vs sanitarium

sanatarium and sanitarium both are nouns.

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

As nouns, sanatarium and sanitarium are synonyms defined as:

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

Other synonyms of sanatarium include sanatorium.

sanatarium (noun)	sanitarium (noun)
a hospital for recuperation or for the treatment of chronic diseases	a hospital for recuperation or for the treatment of chronic diseases