114 entries under expression topic. ×
| phone line | |
| primary element(source, foundation, infrastructure) | |
| primum mobile(idiom, cause) | |
| product line | |
| production line | |
| radiation source | |
| rail line | |
| railway line | |
| river source | |
| rock bottom(cause, source) | |
| root cause | |
| root of a plant | |
| root system | |
| root word | |
| set afloat(idiom, cause) | |
| set on foot(idiom, cause) | |
| short letter | |
| source of emission | |
| source of water | |
| source path |
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| APA | Smart Define. (2015). origin thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/origin/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "origin thesaurus" https://smartdefine.org/origin/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, origin thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/origin/thesaurus/synonyms>. |
| MLA | Smart Define. "origin thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/origin/thesaurus/synonyms> |