Synonyms and related words :
acclimation, acclimatization, accommodation, accustoming, adaption, adjustment, breaking, breaking-in, case hardening, conditioning, conquering, crushing, domestication, familiarization, gentling, habituation, hardening, housebreaking, humbling, humiliation, inurement, naturalization, orientation, quelling, reduction, seasoning, subdual, suppression, training, treading down