self-report personality inventory 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.
a personality inventory in which a person is asked which of a list of traits and characteristics describe her or him or to indicate which behaviors and hypothetical choices he or she would make
Synonyms, antonyms and the broader and narrower relations for self-report personality inventory come from Princeton University’s WordNet. Full sources and licences.