abstraction has 5 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.
Synonyms, antonyms and the broader and narrower relations for abstraction come from Princeton University’s WordNet. Full sources and licences.
the act of withdrawing or removing something
the process of formulating general concepts by abstracting common properties of instances
preoccupation with something to the exclusion of all else
a general concept formed by extracting common features from specific examples