dissolve has 11 distinct synonyms spread across 7 of its 12 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.
cause to go into a solution
“The recipe says that we should dissolve a cup of sugar in two cups of water”
cause to lose control emotionally
“The news dissolved her into tears”
lose control emotionally
“She dissolved into tears when she heard that she had lost all her savings in the pyramid scheme”
pass into a solution
“The sugar quickly dissolved in the coffee”
(film) a gradual transition from one scene to the next; the next scene is gradually superimposed as the former scene fades out
Synonyms, antonyms and the broader and narrower relations for dissolve come from Princeton University’s WordNet. Full sources and licences.