clement iii has 1 distinct synonym spread across 1 of its 1 sense. 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.
Italian antipope from 1080 to 1100 who was installed as pope by the Holy Roman Emperor Henry IV who consistently opposed efforts at papal reform (died in 1100)
Synonyms, antonyms and the broader and narrower relations for clement iii come from Princeton University’s WordNet. Full sources and licences.