Synonyms of addict

1 Syllable
fiend, hound, nut, fan, freak, buff
2 Syllables
dopers, hophead, junkie, druggie, doper, zealot
3 Syllables
follower, enthusiast, votary, fanatic, habitué, dopehead, votarient, followers, votarist, devotee
4 Syllables
habituating, habituate, activity, practitioner