Doubtful and Questionless

Opposite meaning words

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

Usage example: the election results were highly doubtful, so an investigation was begun

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Questionless is an antonym for doubtful.

Definitions of Doubtful not found.

Doubtful is an antonym for questionless in confident topic.

Cite this Source

Questionless and Doubtful. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/doubtful/questionless

Doubtful & Questionless. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/doubtful/questionless>.

Questionless or Doubtful. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/doubtful/questionless.

Google Ngram Viewer shows how "doubtful" and "questionless" have occurred on timeline