insane Synonyms

mad harebrained reasonless fruity kookie kooky loopy nuts round the bend whacky feebleminded amok grigri unzipped kook washing-up potty dotty bonkers bats ridiculous risible sappy senseless silly stupid tared touched unbalanced unreasonable wacky weird wild cockeyed around the bend barmy unhinged looney apeshit certifiable psycho psychotic mad as a hatter paranoid psychopathic psychopathologic psychopathological scatterbrain schizo schizoid