Blue
Blue adjective - Depicting or referring to sexual matters in a way that is unacceptable in polite society.
Undecorous and blue are semantically related In some cases you can use "Undecorous" instead an adjective "Blue".
Undecorous
Blue and undecorous are semantically related in obscene topic. Sometimes you can use "Blue" instead an adjective "Undecorous".
Mutual synonyms
Cite this Source
Undecorous and Blue. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/blue/undecorous
Blue & Undecorous. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/blue/undecorous>.
Undecorous or Blue. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/blue/undecorous.
Google Ngram Viewer shows how "blue" and "undecorous" have occurred on timeline