partition has 8 distinct synonyms spread across 4 of its 6 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.
(computer science) the part of a hard disk that is dedicated to a particular operating system or application and accessed as a single unit
the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart
divide into parts, pieces, or sections
“The Arab peninsula was partitioned by the British”
Synonyms, antonyms and the broader and narrower relations for partition come from Princeton University’s WordNet. Full sources and licences.