- Definitions|2
- Thesaurus|429
- Abbreviations|0
38 entries under expression topic. ×
| main ingredient(noun, essential, foundation, keystone) | |
| mechanical advantage(idiom, instrument) | |
| mechanical powers(idiom, instrument) | |
| motivating force(noun, impetus) | |
| motive force(noun, impetus) | |
| nitty gritty(root, intermediacy) | |
| pro and con(idiom, motive) | |
| radial point(root, intermediacy) | |
| reason why(idiom, motive) | |
| secret motive(idiom, motive) | |
| square one(cause, source, derivation) | |
| starting place(cause, source, origin) | |
| vera causa(idiom, cause) | |
| vital element(noun, essential, foundation, keystone) | |
| water wheel(idiom, instrument) | |
| wave maker(noun, yeast, leavening) | |
| wheel and axle(idiom, instrument) | |
| wheels within wheels(idiom, instrument) |
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| APA | Smart Define. (2015). mainspring thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/mainspring/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "mainspring thesaurus" https://smartdefine.org/mainspring/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, mainspring thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/mainspring/thesaurus/synonyms>. |
| MLA | Smart Define. "mainspring thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/mainspring/thesaurus/synonyms> |