Synonyms of mad in English:


See US English definition of MAD

See UK English definition of mad

See Spanish definition of loco


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, foaming at the mouth
British sectionable
Midlands English yampy
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, bonkers, 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, dotty, batty, round the twist, off one's trolley, as daft as a brush, not the full shilling, 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


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, crackpot, crackbrained
British informal daft


4‘he's mad about jazz’

enthusiastic, passionate, impassioned, keen on
ardent, zealous, fervent, avid, eager, fervid, fanatical, addicted to, devoted to, infatuated with, in love with, hot for
informal crazy, nuts, wild, hooked on, gone on
British informal potty, dotty
North American informal nutso


5‘we made mad, passionate love’

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


    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
    informal like crazy, hammer and tongs
    British informal, dated like billy-o
    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
    informal lose one's marbles
    British informal go barmy, go off one's trolley, go round the twist, go crackers, go doolally, go doolally tap

    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
    informal 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
    vulgar slang go apeshit

    3‘the crowd went mad with excitement’

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