- = uncertainty, confusion, hesitation, dilemma, scepticism, misgiving, suspense, indecision, bewilderment, lack of confidence, hesitancy, perplexity, vacillation, lack of conviction, irresolution, dubiety •
They were troubled and full of doubt.
opposites: confidence, belief, conviction, certainty
- = suspicion, scepticism, distrust, questioning, fear, reservations, cynicism, disbelief, apprehension, mistrust, misgivings, disquiet, qualms, incredulity, lack of faith, misbelief •
Where there is doubt, may we bring faith.
opposites: trust, confidence, belief
- = difficulty, problem, confusion, dilemma, ambiguity (informal), quandary, perplexity •
There is some doubt whether it will be any more effective.
- = be uncertain, question, query, be sceptical, have reservations about, be dubious •
They doubted whether that could happen.
- = waver, hesitate, vacillate, sway, fluctuate, dither (mainly British), haver, oscillate, chop and change, blow hot and cold (informal), keep changing your mind, shillyshally (informal), be irresolute or indecisive, swither (Scottish) •
Stop doubting and start loving.
- = disbelieve, question, challenge, suspect, dispute, query, distrust, mistrust, cast doubt on, have doubts about, lack confidence in, have misgivings about, misgive •
I have no reason to doubt his word.
opposites: believe, accept, trust, buy (slang), swallow (informal), take on board, have faith in
In affirmative sentences, whether was in the past the only word considered acceptable for linking the verb doubt to a following clause, for example I doubt whether he will come. Nowadays, doubt if and doubt that are both considered acceptable alternatives to doubt whether. In negative sentences, use that after doubt, for example I don't doubt that he is telling the truth. The old-fashioned form not doubt but that, as in I do not doubt but that he is telling the truth, is now rarely used and sounds very stiff and formal.