WordNet sense 1 (a person whose behavior deviates from what is acceptable especially in sexual behavior):

degenerate, deviant, deviate, degenerate, deviate

WordNet sense 2 (corrupt morally or by intemperance or sensuality):

corrupt, debase, debauch, demoralize, deprave, misdirect, profane, subvert, vitiate, demoralise

WordNet sense 3 (practice sophistry; change the meaning of or be vague about in order to mislead or deceive):

convolute, sophisticate, twist, twist around

WordNet sense 4 (change the inherent purpose or function of something):

abuse, misuse, abuse