powered 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 unpowered.
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.
(often used in combination) having or using or propelled by means of power or power of a specified kind
“powered flight”
Synonyms, antonyms and the broader and narrower relations for powered come from Princeton University’s WordNet. Full sources and licences.