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")
repulsive -- (possessing the ability to repel; "a repulsive force")
hideous, repulsive -- (so extremely ugly as to be terrifying; "a hideous scar"; "a repulsive mask")