Fast
Fast adverb - With great speed.
In perpetuum and fast are semantically related. In some cases you can use "In perpetuum" instead an adverb "Fast".
In perpetuum
Fast and in perpetuum are semantically related. Sometimes you can use "Fast" instead an adverb phrase "In perpetuum".
Cite this Source
In perpetuum and Fast. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/fast/in_perpetuum
Fast & In perpetuum. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/fast/in_perpetuum>.
In perpetuum or Fast. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/fast/in_perpetuum.
Google Ngram Viewer shows how "fast" and "in perpetuum" have occurred on timeline