DOUBTFULNESS Scrabble 18 Words With Friends 23 Definition noun the state of being unsure of something. — synonyms: doubt, uncertainty, incertitude, dubiety, dubiousness noun uncertainty about the truth or factuality or existence of something. — synonyms: doubt, dubiousness, question See all 726 words you can make from DOUBTFULNESS → 12-letter words Words starting with D Words ending with S ← Unscramble different letters