sanitarium vs sanatarium

sanitarium and sanatarium both are nouns.

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

As nouns, sanitarium and sanatarium are synonyms defined as:

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

Other synonyms of sanitarium include sanatorium.

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