The Oxford Thesaurus An A-Z Dictionary of Synonyms - mad adj.

1) insane, deranged, crazy, crazed, demented, lunatic, unhinged, delirious, out of one's mind or head, psychotic, maniacal, (mentally) unbalanced, mentally ill, of unsound mind, non compos mentis, Chiefly Brit daft, Colloq out of one's head, touched (in the head) , screwy, cuckoo, mental, certifiable, having a screw loose, dotty, cracked, mad as a March hare, mad as a hatter, not all there, off-the-wall, stark raving mad, Chiefly Brit potty, US nutty as a fruit cake; Slang nuts, loony, goofy, loopy, crackers, batty, off one's rocker or trolley, bananas, Brit round the bend or twist, twisted, off one's chump, barmy or balmy, bonkers, US out to lunch, bughouse, bugs, crazy as a bedbug or a coot, loco, wacky, out of one's tree, meshuga: You're mad if you think I'm going in there with that lion. 2) foolish, silly, childish, immature, puerile, wild, nonsensical, foolhardy, madcap, heedless, senseless, absurd, imprudent, unwise, indiscreet, rash, ill-advised, ill-considered, reckless, extravagant, irrational, fatuous: I did many mad things when I was a student. Hitching to Inverness is a mad idea. 3) wild, ferocious; rabid: Have they caught that mad dog yet? 4 furious, angry, infuriated, incensed, enraged, irate, fuming, berserk, irritated, provoked, wrathful, exasperated, Literary wroth: Will you get mad if I ask you a question? Please don't be mad with me - I wrecked your car. 5) like mad. madly, feverishly, in a frenzy, frenziedly, desperately, excitedly, violently, wildly, hysterically, furiously; enthusiastically, fervently, ardently; Colloq like crazy: He's been running about like mad trying to find her. 6) mad (about or for) . crazy, infatuated, ardent, enthusiastic, eager, avid, zealous, passionate, fervent, fervid, keen, fanatical, wild, Colloq hooked, Brit dotty, Slang nuts: She's absolutely mad about cricket.