mutilation has 3 distinct synonyms spread across 1 of its 2 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
an injury that causes disfigurement or that deprives you of a limb or other important body part
the act of damaging the appearance or surface of something
“the defacement of an Italian mosaic during the Turkish invasion”
Synonyms, antonyms and the broader and narrower relations for mutilation come from Princeton University’s WordNet. Full sources and licences.