abhorrent, detestable, obscene, repugnant, repulsive -- (offensive to the mind; "an abhorrent deed"; "the obscene massacre at Wounded Knee"; "morally repugnant customs"; "repulsive behavior"; "the most repulsive character in recent novels")
abominable, detestable, execrable, odious -- (unequivocally detestable; "abominable treatment of prisoners"; "detestable vices"; "execrable crimes"; "consequences odious to those you govern"- Edmund Burke)