Improper
Improper adjective - Not appropriate for a particular occasion or situation.
Usage example: an improper use of slang in a formal piece of writing
Naughty is a synonym for improper in indecent topic. In some cases you can use "Naughty" instead an adjective "Improper", when it comes to topics like usual. vulgar substitute
Nearby Word: improperly
Naughty
Naughty adjective - Engaging in or marked by childish misbehavior.
Usage example: told her to act her age and stop throwing temper tantrums like a naughty little girl
Improper is a synonym for naughty in indecent topic. You can use "Improper" instead an adjective "Naughty", if it concerns topics such as obscene, usual. popular alternative
Mutual synonyms
Cite this Source
Naughty and Improper. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/improper/naughty
Improper & Naughty. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/improper/naughty>.
Naughty or Improper. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/improper/naughty.
Google Ngram Viewer shows how "improper" and "naughty" have occurred on timeline