snatch has 14 distinct synonyms spread across 6 of its 8 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.
(law) the unlawful act of capturing and carrying away a person against their will and holding them in false imprisonment
a weightlift in which the barbell is lifted overhead in one rapid motion
the act of catching an object with the hands
“Mays made the catch with his back to the plate”
take away to an undisclosed location against their will and usually in order to extract a ransom
“The industrialist's son was kidnapped”
1 of the 8 recorded senses carries no synonym, antonym or related term, so it is not shown above. Every sense, with its definition and examples, is on the full entry for snatch.
Synonyms, antonyms and the broader and narrower relations for snatch come from Princeton University’s WordNet. Full sources and licences.