Synonyms for unsure Found 5 synonyms across 2 meanings for “unsure”. lacking self-confidence (adj) diffidentshytimid lacking or indicating lack of confidence or assurance (adj) uncertainincertain Explore Related Words Rhymes with unsureSynonyms for diffidentSynonyms for shySynonyms for timidSynonyms for uncertainSynonyms for incertain Synonym Finder | Rhyme Finder | Poetry Editor