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, August 16, from https://thesaurus.plus/related/fast/subitaneous
Fast & Subitaneous. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/fast/subitaneous>.
Subitaneous or Fast. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/fast/subitaneous.
Google Ngram Viewer shows how "fast" and "subitaneous" have occurred on timeline