Sanitarium :: Sanitarium (n.) A health station or retreat; a sanatorium.
Sanitary :: Sanitary (a.) Of or pertaining to health; designed to secure or preserve health; relating to the preservation or restoration of health; hygienic; as, sanitary regulations. See the Note under Sanatory..
Sanitation :: Sanitation (n.) The act of rendering sanitary; the science of sanitary conditions; the preservation of health; the use of sanitary measures; hygiene.