- Definitions|1
- Thesaurus|348
- Abbreviations|0
| ejaculate | |
| emergence(start, rise, origin, birth, genesis) | |
| emission source(expression, idiom) | |
| emitting source(expression, idiom) | |
| enroot | |
| essence(cause, source, origin) | |
| essentiality(cause, source, origin) | |
| expert(cause, foundation, basis) | |
| first place(noun, expression, start, beginning, opening) | |
| fons et origo(expression, idiom, cause) | |
| footing(cause, quick, source, origin, stem) | |
| fore(noun, start, beginning, opening, introduction) | |
| foremost | |
| formation(start, origin, birth, genesis) | |
| forward movement(expression, idiom) | |
| founding(start, origin) | |
| fountains | |
| front(noun, start, beginning, opening, introduction) | |
| frontals | |
| frontline |
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| APA | Smart Define. (2015). fountainhead thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/fountainhead/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "fountainhead thesaurus" https://smartdefine.org/fountainhead/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, fountainhead thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/fountainhead/thesaurus/synonyms>. |
| MLA | Smart Define. "fountainhead thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/fountainhead/thesaurus/synonyms> |