[1] : The Collaborative International Dictionary of English v.0.48

hot-head \hot"-head`\, n.
   a violent, passionate person; a hasty or impetuous person;
   as, the rant of a hot-head.
   1913 webster

[2] : WordNet (r) 2.0

hothead
     n 1: a belligerent grouch syn: fire-eater
     2: a reckless impetuous irresponsible person syn: daredevil,
         madcap, swashbuckler, lunatic, harum-scarum
see also:
fire-eater daredevil madcap swashbuckler lunatic harum-scarum 

[3] : Moby Thesaurus II by Grady Ward, 1.0

60 moby thesaurus words for "hothead":
   mafioso, tartar, young turk, bear, beast, beldam, berserk,
   berserker, bomber, brute, crank, crosspatch, demon, devil, dragon,
   feist, fiend, fire-eater, firebrand, fury, goon, gorilla,
   grizzly bear, grouch, gunsel, hardnose, hell-raiser, hellcat,
   hellhound, hellion, holy terror, hood, hoodlum, hotspur,
   incendiary, killer, mad dog, madcap, monster, mugger, rapist,
   revolutionary, savage, she-wolf, sorehead, spitfire, termagant,
   terror, terrorist, tiger, tigress, tough, tough guy, ugly customer,
   violent, virago, vixen, wild beast, witch, wolf

Hothead >> H Words
Hothead, definition of term: Hothead
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