evasion has 4 distinct synonyms spread across 3 of its 4 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.
a statement that is not literally false but that cleverly avoids an unpleasant truth
the deliberate act of failing to pay money
“his evasion of all his creditors”
nonperformance of something distasteful (as by deceit or trickery) that you are supposed to do
“his evasion of his clear duty was reprehensible”
Synonyms, antonyms and the broader and narrower relations for evasion come from Princeton University’s WordNet. Full sources and licences.