resonance has 7 distinct synonyms spread across 2 of its 5 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. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
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 excited state of a stable particle causing a sharp maximum in the probability of absorption of electromagnetic radiation
a vibration of large amplitude produced by a relatively small vibration near the same frequency of vibration as the natural frequency of the resonating system
Synonyms, antonyms and the broader and narrower relations for resonance come from Princeton University’s WordNet. Full sources and licences.
having the character of a loud deep sound; the quality of being resonant
the quality imparted to voiced speech sounds by the action of the resonating chambers of the throat and mouth and nasal cavities