scorch has 4 distinct synonyms spread across 4 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.
Synonyms, antonyms and the broader and narrower relations for scorch come from Princeton University’s WordNet. Full sources and licences.
destroy completely by or as if by fire
“The wildfire scorched the forest and several homes”
become scorched or singed under intense heat or dry conditions
“The exposed tree scorched in the hot sun”
a plant disease that produces a browning or scorched appearance of plant tissues