Improper
Improper adjective - Not appropriate for a particular occasion or situation.
Preposterous and improper are semantically related. in not suitable topic. In some cases you can use "Preposterous" instead an adjective "Improper".
Nearby Word: improperly
Preposterous
Preposterous adjective - Conceived or made without regard for reason or reality.
Improper and preposterous are semantically related. Sometimes you can use "Improper" instead an adjective "Preposterous".
Mutual synonyms
Cite this Source
Preposterous and Improper. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/improper/preposterous
Improper & Preposterous. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/improper/preposterous>.
Preposterous or Improper. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/improper/preposterous.
Google Ngram Viewer shows how "improper" and "preposterous" have occurred on timeline