瘾 (w)

(yǐn) addiction; craving

瘾君子 (w)

(yǐnjūnzǐ) opium eater; drug addict; chain smoker

瘾头 (w)

(yǐntóu) craving; addiction

瘾头儿 (w)

(yǐntóur) erhua variant of 癮頭|瘾头, craving; addiction