Desperado \Des`per*a"do\, n.; pl. Desperadoes. [OSp. desperado, p. p. of desperar, fr. L. desperare. See Desperate.]

A reckless, furious man; a person urged by furious passions, and regardless of consequence; a wild ruffian. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

78 Moby Thesaurus words for "desperado": Cain, Judas, apache, assassin, assassinator, badman, bandit, betrayer, bloodletter, bloodshedder, bravo, bucko, bully, bullyboy, burker, butcher, button man, cannibal, convict, criminal, crook, cutthroat, deceiver, desperate criminal, devil, double-dealer, eradicator, executioner, exterminator, felon, fugitive, gallows bird, gangster, gaolbird, garroter, gorilla, gun, gunman, gunsel, hatchet man, head-hunter, hell-raiser, hellcat, hit man, homicidal maniac, homicide, jailbird, killer, lawbreaker, mad dog, man-eater, man-killer, manslayer, massacrer, matador, mobster, murderer, outlaw, pesticide, poison, poisoner, public enemy, quisling, racketeer, rough, rowdy, ruffian, scofflaw, slaughterer, slayer, strangler, swindler, thief, thug, torpedo, traitor, trigger man, two-timer

Source: Moby Thesaurus II by Grady Ward, 1.0
 

desperado

Source: WordNet (r) 2.0
 

Desperado \Des`per*a"do\, n.; pl. Desperadoes. [OSp. desperado, p. p. of desperar, fr. L. desperare. See Desperate.]

A reckless, furious man; a person urged by furious passions, and regardless of consequence; a wild ruffian.

Source: Webster's Revised Unabridged Dictionary (1913)