Doubtful and Surefire

Opposite meaning words

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

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Surefire is an antonym for doubtful.

Surefire adjective - Not likely to fail.

Usage example: pizza seems like a surefire choice for a food that everyone at the party will be happy with

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Doubtful is an antonym for surefire in topics: inevitable, absolutely certain.

Cite this Source

Surefire and Doubtful. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/doubtful/surefire

Doubtful & Surefire. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/doubtful/surefire>.

Surefire or Doubtful. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/doubtful/surefire.

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