Fast
Fast adjective - Marked by the ability to withstand stress without structural damage or distortion.
Usage example: as the storm approached, we checked to see that every thing on the outside of the house was fast and locked in position
Irrefragable and fast are semantically related. In some cases you can use "Irrefragable" instead an adjective "Fast".
Irrefragable
Irrefragable adjective - Not capable of being challenged or proved wrong.
Fast and irrefragable are semantically related. Sometimes you can use "Fast" instead an adjective "Irrefragable".
Cite this Source
Irrefragable and Fast. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/fast/irrefragable
Fast & Irrefragable. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/fast/irrefragable>.
Irrefragable or Fast. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/fast/irrefragable.
Google Ngram Viewer shows how "fast" and "irrefragable" have occurred on timeline