- Definitions|0
- Thesaurus|281
- Abbreviations|1
| dense(adjective, strong, hard, tough, sturdy) | |
| difficult | |
| diligent | |
| earnest | |
| earthen(clay, grey, heather) | |
| etiquette(noun, style, rule, practice, system) | |
| exigent | |
| fair and square(adjective, honest, just) | |
| ferric(adjective, strong, hard, tough, sturdy) | |
| ferrous(adjective, strong, hard, tough, sturdy) | |
| fictile(clay, grey, heather) | |
| firm(adjective, strong, hard, tough, severe) | |
| forceful(adjective, severe, stiff, tight, strict) | |
| formality(noun, style, rule, practice, system) | |
| formula(noun, system, arrangement, procedure, method) | |
| free of error(expression, idiom, clay, grey, heather) | |
| fussy | |
| genteel(adjective, modest, polite, decent, moral) | |
| gospel | |
| granite(clay, grey, heather) |
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| APA | Smart Define. (2013). by the book thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/by_the_book/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "by the book thesaurus" https://smartdefine.org/by_the_book/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2013, by the book thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/by_the_book/thesaurus/synonyms>. |
| MLA | Smart Define. "by the book thesaurus" 19 May 2013. Web. 29 September 2026. <https://smartdefine.org/by_the_book/thesaurus/synonyms> |