recission 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.
(law) the act of rescinding; the cancellation of a contract and the return of the parties to the positions they would have had if the contract had not been made
“recission may be brought about by decree or by mutual consent”
Synonyms, antonyms and the broader and narrower relations for recission come from Princeton University’s WordNet. Full sources and licences.