- Definitions|2
- Thesaurus|1.7k
- Abbreviations|0
| nonexistent(adjective, nonexistent) | |
| perplexed | |
| scatterbrained(adjective, simple, slow, stupid, boring) | |
| simple(adjective, dull, slow, foolish, stupid) | |
| uncomprehending(adjective, empty, unintelligent) | |
| unintelligent(adjective, simple, slow, indifferent, silly) | |
| unmindful(adjective, obtuse, unperceptive, unobservant) | |
| unreasonable(adjective, careless, stupid, thoughtless, absurd) | |
| unreasoning(adjective, careless, stupid, empty, unthinking) | |
| absent(adjective, usual, deficient, incogitancy) | |
| absurd | |
| astonished | |
| bewildered | |
| brainless(adjective, dull, simple, slow, stupid) | |
| characterless(adjective, dreary, monotonous, uninteresting, unlively) | |
| daft(adjective, simple, slow, silly, stupid) | |
| dense(adjective, dull, simple, slow, stupid) | |
| drained(adjective, clear, free, stupid, empty) | |
| forgetful | |
| glassy |
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| APA | Smart Define. (2015). vacuous thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/vacuous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "vacuous thesaurus" https://smartdefine.org/vacuous/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, vacuous thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/vacuous/thesaurus/synonyms>. |
| MLA | Smart Define. "vacuous thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/vacuous/thesaurus/synonyms> |