Certain
Untiring
Untiring adjective - Showing no signs of weariness even after long hard effort.
Certain and untiring are semantically related. Sometimes you can use "Certain" instead an adjective "Untiring".
Nearby Word: untiringly
Mutual synonyms
Cite this Source
Untiring and Certain. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/certain/untiring
Certain & Untiring. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/certain/untiring>.
Untiring or Certain. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/certain/untiring.
Google Ngram Viewer shows how "certain" and "untiring" have occurred on timeline