The Collaborative International Dictionary of English v.0.48:

Debauch \De*bauch"\, v. t. & i. [imp. & p. p. Debauched; p.
   pr. & vb. n. Debauching.] [F. d['e]baucher, prob.
   originally, to entice away from the workshop; pref. d['e]-
   (L. dis- or de) + OF. bauche, bauge, hut, cf. F. bauge lair
   of a wild boar; prob. from G. or Icel., cf. Icel. b[=a]lkr.
   See Balk, n.]
   To lead away from purity or excellence; to corrupt in
   character or principles; to mar; to vitiate; to pollute; to
   seduce; as, to debauch one's self by intemperance; to debauch
   a woman; to debauch an army.
   [1913 Webster]

         Learning not debauched by ambition.      --Burke.
   [1913 Webster]

         A man must have got his conscience thoroughly debauched
         and hardened before he can arrive to the height of sin.
                                                  --South.
   [1913 Webster]

         Her pride debauched her judgment and her eyes.
                                                  --Cowley.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Debauch \De*bauch"\, n. [Cf. F. d['e]bauche.]
   1. Excess in eating or drinking; intemperance; drunkenness;
      lewdness; debauchery.
      [1913 Webster]

            The first physicians by debauch were made. --Dryden.
      [1913 Webster]

   2. An act or occasion of debauchery.
      [1913 Webster]

            Silenus, from his night's debauch,
            Fatigued and sick.                    --Cowley.
      [1913 Webster]

WordNet (r) 3.0 (2006):

debauch
    n 1: a wild gathering involving excessive drinking and
         promiscuity [syn: orgy, debauch, debauchery,
         saturnalia, riot, bacchanal, bacchanalia, drunken
         revelry]
    v 1: corrupt morally or by intemperance or sensuality; "debauch
         the young people with wine and women"; "Socrates was
         accused of corrupting young men"; "Do school counselors
         subvert young children?"; "corrupt the morals" [syn:
         corrupt, pervert, subvert, demoralize,
         demoralise, debauch, debase, profane, vitiate,
         deprave, misdirect]

Moby Thesaurus II by Grady Ward, 1.0:

129 Moby Thesaurus words for "debauch":
   abuse, adulterate, alloy, bacchanal, bacchanalia, bacchanalian,
   bastardize, bat, be promiscuous, bender, betray, binge, bout,
   brutalize, bust, canker, carousal, carouse, celebrate, celebration,
   chase women, cheapen, coarsen, commit adultery, compotation,
   confound, contaminate, corrupt, cut loose, debase, debauchery,
   debauchment, deceive, decoy, defile, deflower, degenerate, degrade,
   demoralize, denature, deprave, desecrate, despoil, devalue,
   dissipate, dissipation, distort, drinking bout, drunk,
   drunken carousal, escapade, fling, force, fornicate, free living,
   grovel, guzzle, hell around, high living, infect, inveigle, jag,
   jollify, jolly, killing pace, lark, lead astray, let go, let loose,
   let off steam, licentiousness, live hard, lure, make merry,
   make whoopee, mislead, misuse, orgy, party, pervert, philander,
   ploy, plunge into dissipation, poison, pollute, potation,
   prostitute, pub-crawl, raise hell, rake, randan, randy, rape,
   ravage, ravish, revel, riotous living, roister, ruin, run riot,
   saturnalia, seduce, see life, skylark, sleep around, soil, spree,
   step out, sully, swing, symposium, taint, tear, tempt, toot, twist,
   ulcerate, undo, violate, vitiate, vulgarize, wallow, wanton, warp,
   wassail, whoop it up, whore, wingding, womanize