53 entries under noun topic. ×
| cause(beginning, agent, originator) | |
| start(end, finish, beginning) | |
| origin(cause, basis) | |
| foundation | |
| source(end, point, beginning) | |
| basis(fact, reality) | |
| beginning | |
| occasion | |
| root | |
| font(source, originality) | |
| motive | |
| stimulus | |
| reason | |
| derivation(source, root) | |
| commencement | |
| incentive | |
| argument | |
| breeder | |
| campaign | |
| causa |
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| APA | Smart Define. (2016). effect thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/effect/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "effect thesaurus" https://smartdefine.org/effect/thesaurus/antonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, effect thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/effect/thesaurus/antonyms>. |
| MLA | Smart Define. "effect thesaurus" 2 February 2016. Web. 24 September 2026. <https://smartdefine.org/effect/thesaurus/antonyms> |