inflame has 8 distinct synonyms spread across 3 of its 5 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.
cause inflammation in
“The repetitive motion inflamed her joint”
Synonyms, antonyms and the broader and narrower relations for inflame come from Princeton University’s WordNet. Full sources and licences.
cause to start burning
“The setting sun kindled the sky with oranges and reds”
become inflamed; get sore
“His throat inflamed”