breakable has no recorded synonym. 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 unbreakable.
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.
an article that is fragile and easily broken
“pack the breakables separately”
capable of being broken or damaged
“earthenware pottery is breakable”
Synonyms, antonyms and the broader and narrower relations for breakable come from Princeton University’s WordNet. Full sources and licences.