integration has 3 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. Its one recorded opposite is segregation.
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 action of incorporating a racial or religious group into a community
the act of combining into an integral whole
“a consolidation of two corporations”
an operation used in the calculus whereby the integral of a function is determined
Synonyms, antonyms and the broader and narrower relations for integration come from Princeton University’s WordNet. Full sources and licences.