| raver(noun, brag, peacock, braggart, hotshot) | |
| scholar(intellectual, brain) | |
| self-conceited | |
| self-opinionated | |
| smart alec(noun, expression, smarty, malapert, wiseacre) | |
| smartie | |
| sniffy(aloof, pretentious, haughty, cavalier, conceited) | |
| snippy(fresh, aloof, pretentious, haughty, impertinent) | |
| stuck-up | |
| superior(aloof, pretentious, haughty, cavalier, conceited) | |
| swashbuckler(noun, brag, peacock, braggart, hotshot) | |
| swelled-headed | |
| swelled head(noun, expression, brag, peacock, braggart) | |
| wisdom | |
| a loudmouth | |
| bighead(noun, boaster) | |
| bigwig | |
| bluestocking(intellectual, brain) | |
| boffin(intellectual, brain) | |
| brainbox(intellectual, brain) |
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| APA | Smart Define. (2015). know-it-all thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/know-it-all/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "know-it-all thesaurus" https://smartdefine.org/know-it-all/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, know-it-all thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/know-it-all/thesaurus/synonyms>. |
| MLA | Smart Define. "know-it-all thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/know-it-all/thesaurus/synonyms> |