- drug addict, junkie, junky - a narcotics addict
--1 is a kind of addict
--1 has particulars:cocaine addict; crack addict, binger; heroin addict; opium addict, opium taker; withdrawer - 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 news junkie"
--2 is a kind of enthusiast, partisan, partizan
--2 has particulars: gym rat