version has 9 distinct synonyms spread across 4 of its 6 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.
an interpretation of a matter from a particular viewpoint
“his version of the fight was different from mine”
a written work (as a novel) that has been recast in a new form
“the play is an adaptation of a short novel”
a written communication in a second language having the same meaning as the written communication in a first language
a mental representation of the meaning or significance of something
manual turning of a fetus in the uterus (usually to aid delivery)
Synonyms, antonyms and the broader and narrower relations for version come from Princeton University’s WordNet. Full sources and licences.