Synonym: challenge, dispute, mistrust, question, suspect. Similar words: no doubt, without doubt, double, double up, double back, subtle, trouble, troubled. Meaning: [daʊt] 
n. 1. the state of being unsure of something 2. uncertainty about the truth or factuality of existence of something. v. 1. consider unlikely or have doubts about 2. lack confidence in or have doubts about.
n. 1. the state of being unsure of something 2. uncertainty about the truth or factuality of existence of something. v. 1. consider unlikely or have doubts about 2. lack confidence in or have doubts about. 
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(121) I don't doubt the veracity of your report.
(122) New evidence has cast doubt on the guilty verdict.
(123) The authenticity of her story is beyond doubt.
(124) There's no doubt about Christine's suitability for the job.
(125) The authenticity of the relics is open to doubt.
(126) I doubt whether he'll change his mind.
(127) I doubt if he has read it yet.
(128) I doubt if he can go the distance.
(129) I was in an agony of doubt.
(130) Their honesty is open to doubt.
(131) I doubt we'll ever see him again.
(132) We have no doubt of his ability.
(133) Officialdom will no doubt decide our future.
(134) I had no reason to doubt him.
(135) If in doubt,[sentencedict.com] consult your doctor.
(136) Never doubt the constancy of my love for you.
(137) There is good reason to doubt this.
(138) The latest scientific discoveries cast doubt on earlier theories.
(139) There's no doubt who is the best candidate.
(140) I doubt if anyone will remember me.
(141) The police doubt the truth of his statement.
(142) There is little room for doubt about what happened.
(143) He insinuated his doubt of this action.
(144) There is little doubt he was the killer.
(145) Without a doubt, she's the strongest candidate we've interviewed for the post.
(145) Sentencedict.com is a sentence dictionary, on which you can find excellent sentences for a large number of words.
(146) There was no doubt that the referee had gone by the book .
(147) You have no doubt heard the results of the competition.
(148) There is little doubt, however, that things will improve in the not too distant future.
(149) If you are in any doubt, consult a financial adviser.
(150) Without a shadow of a doubt, he's the most talented player we have.
More similar words: no doubt, without doubt, double, double up, double back, subtle, trouble, troubled, dour, do up, dough, hand out, hold out, in and out, weed out, stand out, send out, find out, washed out, spread out, tremendous.