Uncertain and Without fail

Opposite meaning terms

Uncertain adjective - Likely to change frequently, suddenly, or unexpectedly.

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Without fail is an antonym for uncertain.

Nearby Words: uncertainty, uncertainly

Definitions of Uncertain not found.

Uncertain is an antonym for without fail in topics: certainly, without doubt.

Cite this Source

Without fail and Uncertain. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/uncertain/without_fail

Uncertain & Without fail. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/uncertain/without_fail>.

Without fail or Uncertain. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/uncertain/without_fail.

Google Ngram Viewer shows how "uncertain" and "without fail" have occurred on timeline