Fallible and Foolproof

Opposite meaning words

Fallible adjective - Likely to fail or make errors.

Usage example: everyone is fallible to some degree

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Foolproof is an antonym for fallible.

Nearby Words: fallacy, fallibility

Foolproof adjective - Not liable to failure.

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Fallible is an antonym for foolproof.

Cite this Source

Foolproof and Fallible. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/fallible/foolproof

Fallible & Foolproof. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/fallible/foolproof>.

Foolproof or Fallible. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/fallible/foolproof.

Google Ngram Viewer shows how "fallible" and "foolproof" have occurred on timeline