Synonyms of mad in English:


See definition of mad


1‘he felt he was going 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, away with the fairies, 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, stark staring mad, raving mad, bats, batty, bonkers, dotty, cuckoo, cracked, loopy, loony, bananas, loco, dippy, screwy, schizoid, touched, gaga, up the pole, off the wall, not all there, not right upstairs

British informal barmy, crackers, barking, barking mad, round the twist, off one's trolley, as daft as a brush, not the full shilling

North American informal buggy, nutsy, nutso

out of one's tree, meshuga, squirrelly, wacko

Australian Canadian NZ informal bushed

Australian informal yarra

NZ 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



2‘I'm still mad at him for what he did’


angry, furious, infuriated, irate, raging, enraged, fuming, blazing, flaming mad, blazing mad, in a towering rage, incensed, wrathful, seeing red, cross, indignant, exasperated, irritated, berserk, out of control, beside oneself

informal livid, spare, wild, aerated

informal, dated waxy, in a wax

North American informal sore


calm, unruffled

3‘what sort of mad scheme are you working on?’


foolish, insane, stupid, lunatic, foolhardy, idiotic, irrational, unreasonable, illogical, zany, senseless, nonsensical, absurd, impractical, silly, inane, asinine, ludicrous, wild, unwise, imprudent, preposterous

informal crazy, daft, crackpot, crackbrained



4‘he's mad about jazz’


enthusiastic, passionate, impassioned, keen on

informal ardent, zealous, fervent, avid, eager, fervid, fanatical, addicted to, devoted to, infatuated with, in love with, hot for

informal crazy, potty, dotty, nuts, wild, hooked on, gone on

North American informal nutso



5‘we made mad, passionate love’


unrestrained, uncontrolled, uninhibited, wild, abandoned, overpowering, overwhelming, excited, frenzied, frantic, frenetic, ebullient, energetic, boisterous


    go mad

      1‘he subsequently went mad and threw himself in front of a train’


      become insane, lose one's reason, lose one's mind, take leave of one's senses, go off one's head, go crazy


      lose one's marbles

      British informal

      go barmy, go off one's trolley, go round the twist, go crackers

      2‘when I told her I was going to be an actor, my mother went mad’


      become very angry, lose one's temper, get in a rage, rant, rant and rave, fulminate


      go crazy


      explode, burst, go off the deep end, go ape, flip, flip one's lid

      British informal

      do one's nut

      North American informal

      flip one's wig

      informal, vulgar slang

      go apeshit


      3‘the crowd went mad with excitement’


      become frenzied, become uncontrollable, lose control, erupt, boil over

    like mad

      1‘the two men turned towards me, and I ran like mad’


      fast, furiously, as fast as possible, as fast as one's legs can carry one, hurriedly, quickly, rapidly, speedily, hastily

      2‘he had to fight like mad to get away’


      energetically, enthusiastically, madly, with a will, for all one is worth, passionately, intensely, ardently, fervently


      like crazy, hammer and tongs

      British informal, dated

      like billy-o