junkie

from WordNet (r) 3.0 (2006)

junkie
    n 1: a narcotics addict [syn: {drug addict}, {junkie}, {junky}]
    2: someone who is so ardently devoted to something that it
       resembles an addiction; "a golf addict"; "a car nut"; "a
       bodybuilding freak"; "a news junkie" [syn: {addict}, {nut},
       {freak}, {junkie}, {junky}]

from Moby Thesaurus II by Grady Ward, 1.0

32 Moby Thesaurus words for "junkie":
      LSD user, acidhead, addict, alcoholic, chain smoker,
      cocaine sniffer, cokie, cubehead, dipsomaniac, dope fiend, doper,
      drug abuser, drug addict, drug user, drunkard, fiend, freak,
      glue sniffer, habitual, head, heavy smoker, hophead, hype,
      marijuana smoker, methhead, narcotics addict, pillhead, pothead,
      snowbird, speed freak, tripper, user

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