power has 22 distinct synonyms spread across 9 of its 11 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 powerlessness.
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.
possession of controlling influence
“the deterrent power of nuclear weapons”
(physics) the rate of doing work; measured in watts (= joules/second)
possession of the qualities (especially mental qualities) required to do something or get something done
“danger heightened his powers of discrimination”
(of a government or government official) holding an office means being in power
“being in office already gives a candidate a great advantage”
one possessing or exercising power or influence or authority
“the mysterious presence of an evil power”
a mathematical notation indicating the number of times a quantity is multiplied by itself
a state powerful enough to influence events throughout the world
energy made available by the flow of electric charge through a conductor
“they built a car that runs on electricity”
Synonyms, antonyms and the broader and narrower relations for power come from Princeton University’s WordNet. Full sources and licences.