Improbable and Surefire

Opposite meaning words

Improbable adjective - Not likely to be true or to occur.

Show all Definitions

Surefire is an antonym for improbable.

Nearby Words: improbability, improbably

Surefire adjective - Not likely to fail.

Show all Definitions

Improbable is an antonym for surefire in easy to foretell topic.

Cite this Source

Surefire and Improbable. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/improbable/surefire

Improbable & Surefire. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/improbable/surefire>.

Surefire or Improbable. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/improbable/surefire.

Google Ngram Viewer shows how "improbable" and "surefire" have occurred on timeline