Certain and Doubtless

Certain

Certain adjective - Having or showing a mind free from doubt.
Usage example: I'm certain that they'll arrive on time

Doubtless and certain are semantically related. In some cases you can use "Doubtless" instead the word "Certain" as an adjective or an adverb.

Nearby Words: certainty, certainly

Doubtless

Doubtless adjective - Having or showing a mind free from doubt.
Usage example: another one of his doubtless predictions that will never come true

Certain and doubtless are semantically related. Sometimes you can use "Certain" instead an adjective "Doubtless".

Nearby Words: doubt, doubtful, doubtlessly
Cite this Source
Doubtless and Certain. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/certain/doubtless
Certain & Doubtless. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/certain/doubtless>.
Doubtless or Certain. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/certain/doubtless.
Google Ngram Viewer shows how "certain" and "doubtless" have occurred on timeline