Doubtful and Not sure

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Doubtful adjective - Not feeling sure about the truth, wisdom, or trustworthiness of someone or something.

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Not sure and doubtful are semantically related. In some cases you can use "Not sure" instead the word "Doubtful" as an adjective or an adverb.

Definitions of Doubtful not found.

Doubtful and not sure are semantically related. Sometimes you can use "Doubtful" instead the phrase "Not sure" as an adjective or an adverb.

Cite this Source

Not sure and Doubtful. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/doubtful/not_sure

Doubtful & Not sure. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/doubtful/not_sure>.

Not sure or Doubtful. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/doubtful/not_sure.

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