dry has 7 distinct synonyms spread across 6 of its 19 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 3 recorded opposites are wet, sweet, phlegmy.
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.
free from liquid or moisture; lacking natural or normal moisture or depleted of water; or no longer wet
“dry land”
lacking moisture or volatile components
“dry paint”
opposed to or prohibiting the production and sale of alcoholic beverages
“the dry vote led by preachers and bootleggers”
(of liquor) having a low residual sugar content because of decomposition of sugar during fermentation
“a dry white burgundy”
without a mucous or watery discharge
“a dry cough”
practicing complete abstinence from alcoholic beverages
“he's been dry for ten years”
a reformer who opposes the use of intoxicating beverages
7 of the 19 recorded senses carry no synonym, antonym or related term, so they are not shown above. Every sense, with its definition and examples, is on the full entry for dry.
Synonyms, antonyms and the broader and narrower relations for dry come from Princeton University’s WordNet. Full sources and licences.