- Definitions|1
- Thesaurus|216
- Abbreviations|0
possible profanity
| dullard | |
| dum-dum | |
| dumbass | |
| dumbo(noun, dummy) | |
| dummkopf | |
| gander | |
| golem | |
| goose | |
| hammerhead shark(expression, idiom) | |
| hardhead | |
| joker | |
| lump | |
| maniac | |
| mome | |
| mutt | |
| nimrod | |
| nincompoop | |
| ninny | |
| ninnyhammer | |
| nit |
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Knucklehead on
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| APA | Smart Define. (2015). knucklehead thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/knucklehead/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "knucklehead thesaurus" https://smartdefine.org/knucklehead/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, knucklehead thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/knucklehead/thesaurus/synonyms>. |
| MLA | Smart Define. "knucklehead thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/knucklehead/thesaurus/synonyms> |