uncertainty

Synonyms: ambiguity ambivalence anxiety bewilderment concern confusion conjecture contingency dilemma disquiet distrust doubtfulness dubiety guesswork hesitancy hesitation incertitude inconclusiveness indecision irresolution lack of confidence misgiving mistrust mystification oscillation perplexity puzzle puzzlement qualm quandary query questionableness reserve scruple skepticism suspicion trouble uneasiness unpredictability vagueness wonder worry

Antonyms: certainty definiteness security sureness