Improper
Improper adjective - Not conforming to legality, moral law, or social convention.
Usage example: improper banking practices
Unconventional is a synonym for improper. In some cases you can use "Unconventional" instead an adjective "Improper". vulgar substitute
Nearby Word: improperly
Unconventional
Unconventional adjective - Not conforming to legality, moral law, or social convention.
Usage example: an unconventional marriage
Improper is a synonym for unconventional. You can use "Improper" instead an adjective "Unconventional".
Nearby Word: unconventionally
Cite this Source
Unconventional and Improper. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/improper/unconventional
Improper & Unconventional. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/improper/unconventional>.
Unconventional or Improper. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/improper/unconventional.
Google Ngram Viewer shows how "improper" and "unconventional" have occurred on timeline