Hard
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
Hard and untiring are semantically related. Sometimes you can use "Hard" instead an adjective "Untiring".
Nearby Word: untiringly
Mutual synonyms
Cite this Source
Untiring and Hard. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/hard/untiring
Hard & Untiring. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/hard/untiring>.
Untiring or Hard. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/hard/untiring.
Google Ngram Viewer shows how "hard" and "untiring" have occurred on timeline