- Definitions|2
- Thesaurus|429
- Abbreviations|0
155 entries under noun topic. ×
| driving force(expression, impetus) | |
| cause(cause, start, reason, object) | |
| motive(cause, start, reason, idea) | |
| source(cause, start, reason, idea) | |
| fountain(cause, connection, source, spring) | |
| ground(cause, start, reason, base) | |
| spring(cause, reason, idea, object) | |
| basis(cause, start, reason, idea) | |
| inspiration(cause, influence, reason, reservoir) | |
| intention(feeling, cause, reason, object) | |
| origin(cause, start, reason, base) | |
| principle(cause, reason, idea, base) | |
| reason(feeling, cause, start, object) | |
| root(cause, reason, idea, object) | |
| grounds(cause, reason, object, element) | |
| keystone(idea, essential, foundation, essence) | |
| motivator(cause, incentive, motive, instigator) | |
| wellspring(cause, source, spring, stream) | |
| action | |
| agent(cause, reason, base, element) |
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| APA | Smart Define. (2015). mainspring thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/mainspring/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "mainspring thesaurus" https://smartdefine.org/mainspring/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, mainspring thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/mainspring/thesaurus/synonyms>. |
| MLA | Smart Define. "mainspring thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/mainspring/thesaurus/synonyms> |