Fast
Fast adverb - With great speed.
Gruelingly and fast are semantically related. In some cases you can use "Gruelingly" instead an adverb "Fast".
Gruelingly
Fast and gruelingly are semantically related. Sometimes you can use "Fast" instead an adverb "Gruelingly".
Mutual synonyms
Cite this Source
Gruelingly and Fast. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/fast/gruelingly
Fast & Gruelingly. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/fast/gruelingly>.
Gruelingly or Fast. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/fast/gruelingly.
Google Ngram Viewer shows how "fast" and "gruelingly" have occurred on timeline