personification has 2 distinct synonyms spread across 2 of its 3 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.
a person who represents an abstract quality
“she is the personification of optimism”
representing an abstract quality or idea as a person or creature
the act of attributing human characteristics to abstract ideas etc.
Synonyms, antonyms and the broader and narrower relations for personification come from Princeton University’s WordNet. Full sources and licences.