chop has 4 distinct synonyms spread across 4 of its 11 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.
move suddenly
Synonyms, antonyms and the broader and narrower relations for chop come from Princeton University’s WordNet. Full sources and licences.
form or shape by chopping
“chop a hole in the ground”
the irregular motion of waves (usually caused by wind blowing in a direction opposite to the tide)
“the boat headed into the chop”
a small cut of meat including part of a rib