pinch has 34 distinct synonyms spread across 10 of its 12 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.
a painful or straitened circumstance
“the pinch of the recession”
an injury resulting from getting some body part squeezed
the act of apprehending (especially apprehending a criminal)
“the policeman on the beat got credit for the collar”
Synonyms, antonyms and the broader and narrower relations for pinch come from Princeton University’s WordNet. Full sources and licences.