| filthier | |
| foul play(expression, dishonesty, corruption, scandal) | |
| fouler | |
| germ | |
| gloop(noun, slush, slime, sludge) | |
| glop(noun, slush, muck, sludge) | |
| gook(noun, stain, ground, grime, filth) | |
| goop(noun, slush, slime, sludge) | |
| grease | |
| gross | |
| ground(stain, grime, filth, impurity, mud) | |
| guck(noun, slush, muck, sludge) | |
| icky buildup | |
| immature | |
| imperfect | |
| infection | |
| inferior | |
| jerk | |
| leavings | |
| loam(grime, filth, mud) |
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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> |