"addict" in the noun sense
1. addict, nut, freak, junkie, junky
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"
someone who is physiologically dependent on a substance abrupt deprivation of the substance produces withdrawal symptoms
"addict" in the verb sense
1. addict, hook
to cause (someone or oneself) to become dependent (on something, especially a narcotic drug)
Source: WordNet® (An amazing lexical database of English)
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