Synonyms for doubt

Noun

1. doubt, uncertainty, incertitude, dubiety, doubtfulness, dubiousness, cognitive state, state of mind

usage: the state of being unsure of something

2. doubt, dubiousness, doubtfulness, question, uncertainty, uncertainness

usage: uncertainty about the truth or factuality of existence of something; "the dubiousness of his claim"; "there is no question about the validity of the enterprise"

Verb

1. doubt, disbelieve, discredit

usage: consider unlikely or have doubts about; "I doubt that she will accept his proposal of marriage"

2. doubt, distrust, mistrust, suspect

usage: lack confidence in or have doubts about; "I doubt these reports"; "I suspect her true motives"; "she distrusts her stepmother"