| foul up(verb, expression, fail, spoil) | |
| become rotten(verb, rude, mistake) | |
| contagious(adjective, rude, mistake) | |
| deadly(adjective, rude, mistake) | |
| dirty(adjective, rude, mistake) | |
| disgusting(adjective, rude, mistake) | |
| fetid(adjective, rude, mistake) | |
| filthy(adjective, rude, mistake) | |
| flat(adjective, rude, mistake) | |
| foul ball(noun, expression, sport, spoil) | |
| foully(adjective, spoil, sin) | |
| loathsome(adjective, spoil, sin) | |
| noisome(adjective, spoil, sin) | |
| noxious(adjective, spoil, sin) | |
| offensive(adjective, spoil, sin) | |
| pestilential(adjective, spoil, sin) | |
| poisonous(adjective, spoil, sin) | |
| putrid(adjective, spoil, sin) | |
| squalid(adjective, spoil, sin) | |
| stale(adjective, spoil, sin) |
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| APA | Smart Define. (2016). foul thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/foul/thesaurus/narrower |
| Chicago | Smart Define. 2016. "foul thesaurus" https://smartdefine.org/foul/thesaurus/narrower (accessed September 25, 2026). |
| Harvard | Smart Define 2016, foul thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/foul/thesaurus/narrower>. |
| MLA | Smart Define. "foul thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/foul/thesaurus/narrower> |