Dubious and Doubtable

Dubious

Dubious adjective - Giving good reason for being doubted, questioned, or challenged.
Usage example: any letter bearing the signature of Geronimo would be of dubious authenticity, to say the least

Doubtable and dubious are semantically related In some cases you can use "Doubtable" instead an adjective "Dubious".

Nearby Words: dubiety, dubiousness, dubiously

Doubtable

Doubtable adjective - Giving good reason for being doubted, questioned, or challenged.
Usage example: her argument rested entirely upon some highly doubtable logic

Dubious and doubtable are semantically related in questionable topic. You can use "Dubious" instead an adjective "Doubtable", if it concerns topics such as doubtful, at issue.

Nearby Words: doubt, doubtful, doubting, doubted, doubter
Cite this Source
Doubtable and Dubious. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/dubious/doubtable
Dubious & Doubtable. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/dubious/doubtable>.
Doubtable or Dubious. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/dubious/doubtable.
Google Ngram Viewer shows how "dubious" and "doubtable" have occurred on timeline