WordNet sense 1 (a rude expression intended to offend or hurt):

contumely, insult, revilement, vilification, insult

WordNet sense 2 (treat badly):

ill-treat, ill-use, maltreat, mistreat, step

WordNet sense 3 (improper or excessive use):

misuse

WordNet sense 4 (use foul or abusive language towards):

blackguard, shout, clapperclaw

WordNet sense 5 (cruel or inhumane treatment):

ill-treatment, ill-usage, maltreatment

WordNet sense 6 (change the inherent purpose or function of something):

pervert, pervert