deaf has 2 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. Its one recorded opposite is hearing.
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.
lacking or deprived of the sense of hearing wholly or in part
(usually followed by `to') unwilling or refusing to pay heed
“deaf to her warnings”
people who have severe hearing impairments
“many of the deaf use sign language”
Synonyms, antonyms and the broader and narrower relations for deaf come from Princeton University’s WordNet. Full sources and licences.