/ Thesaurus / I Synonyms of insane asylum Find synonyms for: Noun1. mental hospital, psychiatric hospital, mental institution, institution, mental home, insane asylum, asylum, hospital, infirmaryusage: a hospital for mentally incompetent or unbalanced personWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language