The Collaborative International Dictionary of English v.0.48:

Drunkard \Drunk"ard\, n. [Drunk + -ard.]
   One who habitually drinks strong liquors immoderately; one
   whose habit it is to get drunk; a toper; a sot.
   [1913 Webster]

         The drunkard and glutton shall come to poverty. --
                                                  Prov. xxiii.
                                                  21.
   [1913 Webster]

WordNet (r) 3.0 (2006):

drunkard
    n 1: a chronic drinker [syn: drunkard, drunk, rummy,
         sot, inebriate, wino]

Moby Thesaurus II by Grady Ward, 1.0:

118 Moby Thesaurus words for "drunkard":
   Bowery bum, LSD user, acidhead, addict, alcoholic,
   alcoholic addict, bacchanal, bacchanalian, beachcomber, beggar,
   beggarly fellow, bibber, big drunk, blighter, bloat, blotter,
   boozehound, boozer, budmash, bum, bummer, caitiff, carouser,
   chain smoker, chronic alcoholic, chronic drunk, cocaine sniffer,
   cokie, cubehead, derelict, devil, devotee of Bacchus, dipsomaniac,
   dope fiend, doper, drifter, drinker, drug abuser, drug addict,
   drug user, drunk, elbow bender, fiend, freak, glue sniffer,
   good-for-naught, good-for-nothing, guzzler, habitual, hard drinker,
   head, heavy drinker, heavy smoker, hobo, hophead, human wreck,
   hype, imbiber, inebriate, junkie, lovepot, lowlife, lush, lusher,
   marijuana smoker, mauvais sujet, mean wretch, methhead, mucker,
   narcotics addict, no-good, oenophilist, pathological drinker,
   pauvre diable, pilgarlic, pillhead, poor creature, poor devil,
   pot companion, pothead, problem drinker, reveler, rummy, sad case,
   sad sack, serious drinker, shikker, skid-row bum, snowbird, soak,
   soaker, social drinker, sot, speed freak, sponge, stiff, sundowner,
   swagman, swigger, swiller, thirsty soul, tippler, toper, tosspot,
   tramp, tripper, truant, user, vag, vagabond, vagrant, vaurien,
   wassailer, wastrel, winebibber, wino, worthless fellow, wretch