holism 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. Its one recorded opposite is atomism.
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 theory that the parts of any whole cannot exist and cannot be understood except in their relation to the whole
“holism holds that the whole is greater than the sum of its parts”
Synonyms, antonyms and the broader and narrower relations for holism come from Princeton University’s WordNet. Full sources and licences.