Synonyms for doubt Found 6 synonyms across 2 meanings for “doubt”. the state of being unsure of something (noun) uncertaintyincertitudedubietydoubtfulnessdubiousness uncertainty about the truth or factuality or existence of something (noun) question Explore Related Words Rhymes with doubtSynonyms for uncertaintySynonyms for incertitudeSynonyms for dubietySynonyms for doubtfulnessSynonyms for dubiousness Synonym Finder | Rhyme Finder | Poetry Editor