Fail-safe
Fail-safe adjective - Not likely to fail.
Usage example: men have traditionally regarded flowers as the fail-safe gift for Valentine's Day
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Synonyms for Fail-safe
Sure
Sure adjective - Not likely to fail.
Usage example: a sure cure for the winter blues—a week in the Bahamas
Nearby Word: surely
Mutual synonyms
Cite this Source
Sure and Fail-safe. (2016). Retrieved 2026, August 18, from https://thesaurus.plus/related/fail-safe/sure
Fail-safe & Sure. N.p., 2016. Web. 18 Aug. 2026. <https://thesaurus.plus/related/fail-safe/sure>.
Sure or Fail-safe. 2016. Accessed August 18, 2026. https://thesaurus.plus/related/fail-safe/sure.