Fast
Fast adjective - Moving, proceeding, or acting with great speed.
Subitaneous and fast are semantically related In some cases you can use "Subitaneous" instead an adjective "Fast".
Subitaneous
Fast and subitaneous are semantically related in quick topic. Sometimes you can use "Fast" instead an adjective "Subitaneous".
Cite this Source
Subitaneous and Fast. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/fast/subitaneous
Fast & Subitaneous. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/fast/subitaneous>.
Subitaneous or Fast. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/fast/subitaneous.
Google Ngram Viewer shows how "fast" and "subitaneous" have occurred on timeline