away has 6 distinct synonyms spread across 7 of its 14 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. Its one recorded opposite is home.
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.
(of a baseball pitch) on the far side of home plate from the batter
“the pitch was away (or wide)”
6 of the 14 recorded senses carry no synonym, antonym or related term, so they are not shown above. Every sense, with its definition and examples, is on the full entry for away.
Synonyms, antonyms and the broader and narrower relations for away come from Princeton University’s WordNet. Full sources and licences.