operable has 5 distinct synonyms spread across 2 of its 3 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 inoperable.
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.
capable of being treated by surgical operation
“an operable cancer”
fit or ready for use or service
“the toaster was still functional even after being dropped”
usable for a specific purpose
Synonyms, antonyms and the broader and narrower relations for operable come from Princeton University’s WordNet. Full sources and licences.
“an operable plan”