Foul
Foul adjective - Depicting or referring to sexual matters in a way that is unacceptable in polite society.
Usage example: that movie features nonstop foul language
Filthy is a synonym for foul in dirty topic. In some cases you can use "Filthy" instead an adjective "Foul", when it comes to topics like obscene, property, good, clean. vulgar substitute
Filthy
Filthy adjective - Depicting or referring to sexual matters in a way that is unacceptable in polite society.
Usage example: you simply cannot use such filthy language on the public airwaves
Foul is a synonym for filthy in dirty topic. You can use "Foul" instead the word "Filthy" as an adjective or a noun, if it concerns topics such as characteristic, property, good, clean. vulgar substitute
Mutual synonyms
Cite this Source
Filthy and Foul. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/foul/filthy
Foul & Filthy. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/foul/filthy>.
Filthy or Foul. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/foul/filthy.
Google Ngram Viewer shows how "foul" and "filthy" have occurred on timeline