vision has 6 distinct synonyms spread across 3 of its 5 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 vivid mental image
“he had a vision of his own death”
the ability to see; the visual faculty
Synonyms, antonyms and the broader and narrower relations for vision come from Princeton University’s WordNet. Full sources and licences.
the perceptual experience of seeing
“the runners emerged from the trees into his clear vision”
the formation of a mental image of something that is not perceived as real and is not present to the senses
“popular imagination created a world of demons”
a religious or mystical experience of a supernatural appearance
“he had a vision of the Virgin Mary”