Untiring and Unrelenting

Untiring

Untiring adjective - Showing no signs of weariness even after long hard effort.
Usage example: the detective's untiring investigation of the crime finally led to several arrests

Unrelenting is a synonym for untiring in continuous topic. In some cases you can use "Unrelenting" instead the word "Untiring" as an adjective or a noun, when it comes to topics like assiduous, tireless.

Nearby Word: untiringly

Unrelenting

Unrelenting adjective - Sticking to an opinion, purpose, or course of action in spite of reason, arguments, or persuasion.

Untiring is a synonym for unrelenting in continuous topic. Sometimes you can use "Untiring" instead the word "Unrelenting" as an adjective or a noun, if it concerns topics such as assiduous.

Nearby Word: unrelentingly
Cite this Source
Unrelenting and Untiring. (2016). Retrieved 2026, August 10, from https://thesaurus.plus/related/untiring/unrelenting
Untiring & Unrelenting. N.p., 2016. Web. 10 Aug. 2026. <https://thesaurus.plus/related/untiring/unrelenting>.
Unrelenting or Untiring. 2016. Accessed August 10, 2026. https://thesaurus.plus/related/untiring/unrelenting.
Google Ngram Viewer shows how "untiring" and "unrelenting" have occurred on timeline