ambit has 5 distinct synonyms spread across 1 of its 1 sense. 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.
an area in which something acts or operates or has power or control: "the range of a supersonic jet"
“a piano has a greater range than the human voice”
Synonyms, antonyms and the broader and narrower relations for ambit come from Princeton University’s WordNet. Full sources and licences.