(n.) The act of habituating, or accustoming; the state of being habituated.

a habit acclimation acclimatization accommodation accustoming acquired tolerance acute alcoholism adaption addictedness addiction adjustment alcoholism amphetamine withdrawal symptoms barbiturate addiction barbiturism breaking breaking-in case hardening chain smoking chronic alcoholism cocainism conditioning crash craving dependence dipsomania domestication drug addiction drug culture drug dependence familiarization hardening housebreaking inurement naturalization nicotine addiction orientation physical dependence psychological dependence seasoning taming tolerance training withdrawal sickness withdrawal symptoms