doubt, n. [indecision], [uncertainty], [vacillation], [irresolution], [misgiving], [query], [suspense], [hesitancy], [distrust], [suspicion], [quandary], [perplexity]; [skepticism], incredulity, pyrrhonism; ambiguity, [difficulty]. Antonyms: conviction, credulity, [confidence], [decision], [assurance], [belief], [certainty].
doubtful, a. [unsettled], [undetermined], [dubious], [wavering], [precarious], [undecided], [irresolute]; [questionable], involved; [ambiguous], enigmatical, problematical, equivocal, [vague], [indefinite]. Antonyms: [certain], implicit, [sure], [unquestionable], [unwavering].
doubting, a. incredulous, suspicious, [skeptical].
doughfaced, a. [pliable], [weak], [irresolute].
doughty, a. [redoubtable], [valiant], [bold], [fearless].
dour, a. [hard], [obstinate], [sour].
douse, v. [duck], [immerse], [dip], [plunge], [souse], [submerge].
dove, n. pigeon. Associated word: coo.
dovecote, n. columbary, pigeonry, pigeon [house].
dovelike, a. columbine.