unstuck has 1 distinct synonym spread across 1 of its 2 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 stuck.
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.
thrown into a state of disorganization or incoherence
“price programs became unstuck because little grain was available”
Synonyms, antonyms and the broader and narrower relations for unstuck come from Princeton University’s WordNet. Full sources and licences.