Challenging
Challenging adjective - Requiring considerable physical or mental effort.
Usage example: an exceptionally challenging brainteaser
Heavy and challenging are semantically related in difficult topic. In some cases you can use "Heavy" instead an adjective "Challenging".
Heavy
Heavy adjective - Requiring considerable physical or mental effort.
Usage example: until we find our groove, it's going to be heavy sledding on this project
Challenging and heavy are semantically related in onerous topic. Sometimes you can use "Challenging" instead an adjective "Heavy".
Mutual synonyms
Related pairs
Both words in one sentence
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Critics dislike the game for its not-too-challenging difficulty, jackpot-heavy scoring, and the use of live-action movie art instead of the animated cartoon's.
Source: Pinball / The Flintstones - When It Rains, It Pours: About halfway through the cadre act, a heavy rain begins to fall, making the act that much more challenging for the performers.
Source: Theatre / "O" - Yukari Yakumo is a heavy candidate for the most powerful denizen of Gensoukyou, being stated to have enough power to easily destroy the setting, yet manages to put up challenging yet doable fights in the games.
Source: Willfully Weak
Cite this Source
Heavy and Challenging. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/challenging/heavy
Challenging & Heavy. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/challenging/heavy>.
Heavy or Challenging. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/challenging/heavy.
Google Ngram Viewer shows how "challenging" and "heavy" have occurred on timeline