- Definitions|1
- Thesaurus|278
- Abbreviations|0
32 entries under adjective topic. ×
| natural | |
| simple(noun, fool, silly, innocent) | |
| careless | |
| childish | |
| crazy | |
| daft | |
| dead | |
| dense | |
| dreary | |
| dull | |
| easy | |
| elementary | |
| empty | |
| foolish | |
| frivolous | |
| homely | |
| honest | |
| idle | |
| inactive | |
| inattentive |
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| APA | Smart Define. (2015). birdbrain thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/birdbrain/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "birdbrain thesaurus" https://smartdefine.org/birdbrain/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, birdbrain thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/birdbrain/thesaurus/synonyms>. |
| MLA | Smart Define. "birdbrain thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/birdbrain/thesaurus/synonyms> |