In doubt synonyms such as divided, ambiguous, ambivalent, and dithering. In doubt is a noun, and its antonyms are sure and confident. Additionally, here are 44 synonyms for in doubt and words similar to it.
Ambiguous, confused, debatable, doubtful, iffy, in limbo, in no man's land, in the balance, moot, open to debate, open to question, pending, problematic, uncertain, unconfirmed, undecided, unknown, unresolved, unsettled, unsure, and up in the air.
Ambivalent, dithering, divided, doubtful, faltering, fluctuating, hesitant, in a quandary/dilemma, in two minds, indefinite, irresolute, shilly-shallying, sitting on the fence, teetering, tentative, uncertain, undecided, undetermined, unresolved, unsure, vacillating, and wavering.