Synonyms of non compos mentis in English:

non compos mentis

See US English definition of non compos mentis

See UK English definition of non compos mentis


1‘Roger had become non compos mentis through drink and age’

mad, insane, mentally ill, certifiable, deranged, demented, of unsound mind, out of one's mind, not in one's right mind, sick in the head, not together, crazy, crazed, lunatic, non compos mentis, unbalanced, unhinged, unstable, disturbed, distracted, stark mad, manic, frenzied, raving, distraught, frantic, hysterical, delirious, psychotic, psychopathic, mad as a hatter, mad as a March hare, foaming at the mouth
British sectionable
informal mental, off one's head, out of one's head, off one's nut, nuts, nutty, nutty as a fruitcake, off one's rocker, not right in the head, not quite right in the head, round the bend, stark raving mad, raving mad, bats, bonkers, cuckoo, cracked, loopy, loony, bananas, loco, dippy, screwy, schizoid, touched, gaga, off the wall, not all there, not right upstairs
British informal barmy, crackers, barking, barking mad, stark staring mad, batty, dotty, round the twist, off one's trolley, as daft as a brush, not the full shilling, up the pole, away with the fairies
North American informal buggy, nutsy, nutso
out of one's tree, meshuga, squirrelly, wacko
Canadian, Australian, New Zealand informal bushed
Australian informal yarra
New Zealand informal porangi
informal have a screw loose, have bats in one's belfry, have bats in the belfry
Australian informal have kangaroos in one's top paddock, have kangaroos in the top paddock