blaze away has 1 distinct synonym spread across 1 of its 3 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.
perform (an acting passage) brilliantly and rapidly
“Mr. Jones blazed away in one passage after another to loud applause”
Synonyms, antonyms and the broader and narrower relations for blaze away come from Princeton University’s WordNet. Full sources and licences.
speak with fire and passion
“He blazed away at his opponents in the Senate”