Doubtable and Unquestionable

Opposite meaning words

Doubtable adjective - Giving good reason for being doubted, questioned, or challenged.

Usage example: her argument rested entirely upon some highly doubtable logic

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Nearby Words: doubt, doubtful, doubting, doubted, doubter

Unquestionable adjective - Not capable of being challenged or proved wrong.

Usage example: a person of unquestionable integrity

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Doubtable is an antonym for unquestionable.

Cite this Source

Unquestionable and Doubtable. (2016). Retrieved 2026, August 18, from https://thesaurus.plus/related/doubtable/unquestionable

Doubtable & Unquestionable. N.p., 2016. Web. 18 Aug. 2026. <https://thesaurus.plus/related/doubtable/unquestionable>.

Unquestionable or Doubtable. 2016. Accessed August 18, 2026. https://thesaurus.plus/related/doubtable/unquestionable.

Google Ngram Viewer shows how "doubtable" and "unquestionable" have occurred on timeline