Synonyms for atom Found 5 synonyms across 1 meaning for “atom”. (nontechnical usage) a tiny piece of anything (noun) moleculeparticlecorpusclemotespeck Explore Related Words Rhymes with atomSynonyms for moleculeSynonyms for particleSynonyms for corpuscleSynonyms for moteSynonyms for speck Synonym Finder | Rhyme Finder | Poetry Editor