extractor has 4 distinct synonyms spread across 2 of its 3 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 instrument for extracting tight-fitting components
an apparatus that uses centrifugal force to separate particles from a suspension
a mechanism in a firearm that pulls an empty shell case out of the chamber and passes it to the ejector
Synonyms, antonyms and the broader and narrower relations for extractor come from Princeton University’s WordNet. Full sources and licences.