Doubtful
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Doubtful adjective – Giving good reason for being doubted, questioned, or challenged. Usage example: the election results were highly doubtful, so an investigation was begun
Questionable is a synonym for doubtful in unlikely topic. In some cases you can use "Questionable" instead the word "Doubtful" as an adjective or an adverb, when it comes to topics like certain, honest, likely, dubious. popular alternative
Nearby Words: doubt, doubtless, doubting, doubtfulness, doubted
Synonyms for Doubtful
Questionable
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Questionable adjective – Giving good reason for being doubted, questioned, or challenged. Usage example: the runner's unexpected first-place finish is questionable, so a drug test has been ordered
Doubtful is a synonym for questionable in dubious topic. You can use "Doubtful" instead the word "Questionable" as an adjective or an adverb, if it concerns topics such as certain, honest, likely, difficult. popular alternative
Nearby Words: question, questioning, questioned, questioner, questionably
Synonyms for Questionable
Mutual synonyms
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However, a combination of American arms shipments (without which it is quite doubtful it could have turned the tide as well as it did) and some rather questionable generalship on the Arabs' side eventually led to Israel making swift gains and achieving a military victory.
Source: Badass Israeli
Cite this Source
Questionable and Doubtful. (2016). Retrieved 2021, January 16, from https://thesaurus.plus/related/doubtful/questionable
Doubtful & Questionable. N.p., 2016. Web. 16 Jan. 2021. <https://thesaurus.plus/related/doubtful/questionable>.
Questionable or Doubtful. 2016. Accessed January 16, 2021. https://thesaurus.plus/related/doubtful/questionable.
Google Ngram Viewer shows how "doubtful" and "questionable" have occurred on timeline: