Fast
Improper
Improper adjective - Not appropriate for a particular occasion or situation.
Fast and improper are semantically related. Sometimes you can use "Fast" instead an adjective "Improper".
Nearby Word: improperly
Cite this Source
Improper and Fast. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/fast/improper
Fast & Improper. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/fast/improper>.
Improper or Fast. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/fast/improper.
Google Ngram Viewer shows how "fast" and "improper" have occurred on timeline