The state or quality of being doubtful; doubt; uncertainty.

plural of doubting

plural of doubtfulness

plural of doubtful

Alternative spelling of no doubt

uncertain, unclear, unsure

A favorable judgement given in the absence of full evidence. / A trust that something will turn out or happen as hoped for or expected despite concerns.

One who requires proof before believing. / One who finds belief difficult.

The doubting of one's own abilities.

certainly; doubtlessly; unquestionably; indisputably; doubtless; surely; no doubt