stigmatism has no recorded synonym. 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. Its one recorded opposite is astigmatism.
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 condition of having or being marked by stigmata
(optics) condition of an optical system (as a lens) in which light rays from a single point converge in a single focal point
Synonyms, antonyms and the broader and narrower relations for stigmatism come from Princeton University’s WordNet. Full sources and licences.