individuality has 4 distinct synonyms spread across 2 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. Its one recorded opposite is commonality.
the quality of being individual
“so absorbed by the movement that she lost all sense of individuality”
Synonyms, antonyms and the broader and narrower relations for individuality come from Princeton University’s WordNet. Full sources and licences.
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.
the distinct personality of an individual regarded as a persisting entity
“you can lose your identity when you join the army”