Synonyms for insane

Similarity of adj insane

2 senses of insane

Sense 1:

insane (vs. sane)
amuck, amok, berserk, demoniac, demoniacal, possessed(predicate)balmy, barmy, bats, batty, bonkers, buggy, cracked, crackers, daft, dotty, fruity, haywire, kooky, kookie, loco, loony, loopy, nuts, nutty, round the bend, around the bend, wacky, whackybrainsick, crazy, demented, disturbed, mad, sick, unbalanced, unhingedcertifiable, certifiedcrackbrained, idioticcrazed, deranged, half-crazedfey, touched(predicate)hebephreniclunatic, moonstruckmaniacal, maniac(predicate)manic-depressivemaniclikementally ill, unsound, unstablenon compos mentis(predicate), of unsound mind(predicate)paranoidpsychopathic, psychopathologic, psychopathologicalpsychoticraving mad, wildschizophrenicscrew-loose, screwy

Also See: irrational#1; unreasonable#1

Sense 2:

harebrained, insane, mad
foolish (vs. wise)