The Collaborative International Dictionary of English v.0.48:

Booze \Booze\ (b[=oo]z), v. i. [imp. & p. p. Boozed
   (b[=oo]zd); p. pr. & vb. n. Boozing.] [D. buizen; akin to
   G. bausen, and perh. fr. D. buis tube, channel, bus box,
   jar.]
   To drink greedily or immoderately, esp. alcoholic liquor; to
   tipple. [Written also bouse, and boose.] --Landor.
   [1913 Webster]

         This is better than boozing in public houses. --H. R.
                                                  Haweis.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Booze \Booze\, n.
   1. A carouse; a drinking. --Sir W. Scott.
      [1913 Webster]

   2. any alcoholic beverage, especially a strong beverage such
      as whiskey.
      [PJC]

WordNet (r) 3.0 (2006):

booze
    n 1: an alcoholic beverage that is distilled rather than
         fermented [syn: liquor, spirits, booze, hard drink,
         hard liquor, John Barleycorn, strong drink]
    v 1: consume alcohol; "We were up drinking all night" [syn:
         drink, booze, fuddle]

Moby Thesaurus II by Grady Ward, 1.0:

80 Moby Thesaurus words for "booze":
   John Barleycorn, alcohol, alcoholic beverage, alcoholic drink,
   aqua vitae, ardent spirits, bat, bender, beverage, bib, brannigan,
   brew, bum, carouse, chug, chug-a-lug, drain the cup, drink,
   drink in, drink off, drink to, drink up, drunk, firewater, grog,
   guzzle, hard liquor, hooch, imbibe, inebriant, intoxicant,
   intoxicating liquor, jag, juice, liquor, liquor up,
   little brown jug, lush, mountain dew, pledge, poison, potable,
   potation, pull, punch bowl, quaff, raise the elbow, rum, sauce,
   schnapps, sip, soak, social lubricant, souse, spirits,
   strong drink, strong waters, suck, suck in, suckle, sup, swig,
   swill, tank up, the Demon Rum, the bottle, the cup,
   the flowing bowl, the luscious liquor, the ruddy cup, tipple,
   toast, toss down, toss off, toxicant, wash down, water of life,
   whiskey, white lightning, white mule