addict

Noun
  1. Someone who is so ardently devoted to something that it resembles an addiction (synset 109788499)
    "a golf addict"; "a car nut"; "a bodybuilding freak"; "a news junkie"
    is a type of: enthusiast, partisan, partizan - an ardent and enthusiastic supporter of some person or activity
    subtypes: gym rat - someone who spends all leisure time playing sports or working out in a gymnasium or health spa
    same as: freak, junkie, junky, nut
  2. Someone who is physiologically dependent on a substance;
    Abrupt deprivation of the substance produces withdrawal symptoms (synset 109788253)
    is a type of: drug user, substance abuser, user - a person who takes drugs
    subtypes:
Verb
  1. To cause (someone or oneself) to become dependent (on something, especially a narcotic drug) (synset 201167606)
    entail: habituate, use - take or consume (regularly or habitually)
    is a type of: accustom, habituate - make psychologically or physically used (to something)
    same as: hook

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