saturation has 4 distinct synonyms spread across 2 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.
the process of totally saturating something with a substance
“the impregnation of wood with preservative”
the act of soaking thoroughly with a liquid
Synonyms, antonyms and the broader and narrower relations for saturation come from Princeton University’s WordNet. Full sources and licences.
a condition in which a quantity no longer responds to some external influence
chromatic purity: freedom from dilution with white and hence vivid in hue