Dubious and Surefire

Dubious

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

Surefire is an antonym for dubious.

Nearby Words: dubiety, dubiousness, dubiously

Surefire

Surefire adjective - Not likely to fail.

Dubious is an antonym for surefire in inevitable topic.
Cite this Source
Surefire and Dubious. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/dubious/surefire
Dubious & Surefire. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/dubious/surefire>.
Surefire or Dubious. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/dubious/surefire.
Google Ngram Viewer shows how "dubious" and "surefire" have occurred on timeline