| slight | |
| slob | |
| smear | |
| smudginess | |
| so-and-so | |
| soot | |
| spot | |
| sticky substance | |
| stigma | |
| stinkard | |
| sullage | |
| swine | |
| tainting | |
| terra firma(expression, grime, filth, mud) | |
| trashed | |
| trashy | |
| ugly | |
| uncleanness(waste, refuse, dishonesty, corruption, soil) | |
| unfortunate | |
| unsatisfactory |
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Crud on
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| APA | Smart Define. (2015). crud thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/crud/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "crud thesaurus" https://smartdefine.org/crud/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, crud thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/crud/thesaurus/synonyms>. |
| MLA | Smart Define. "crud thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/crud/thesaurus/synonyms> |