Surefire
Surefire adjective - Not likely to fail.
Steadfast
Steadfast adjective - Firm in one's allegiance to someone or something.
Surefire and steadfast are semantically related. You can use "Surefire" instead an adjective "Steadfast".
Nearby Words: steadfastness, steadfastly
Mutual synonyms
Cite this Source
Steadfast and Surefire. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/surefire/steadfast
Surefire & Steadfast. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/surefire/steadfast>.
Steadfast or Surefire. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/surefire/steadfast.
Google Ngram Viewer shows how "surefire" and "steadfast" have occurred on timeline