| destroyer | |
| embarkation(noun, cause, beginning, foundation, origin) | |
| franker | |
| freer | |
| generator(noun, cause, source, derivation) | |
| inauguration(noun, appearance, top, beginning, opening) | |
| inaugurator | |
| initiation(noun, appearance, top, beginning, opening) | |
| initiator | |
| knob(noun, handle, lump, button, dial) | |
| launching(noun, appearance, start, beginning, opening) | |
| open sesame(noun, entry) | |
| origin(noun, cause, top, beginning, opening) | |
| password(opening, instrumentality) | |
| preliminary(noun, approach, introduction, preface, kickoff) | |
| skeleton key | |
| starting point(noun, expression, top, beginning, opening) | |
| unfolder | |
| admission(noun, appearance, start, beginning, onset) | |
| alpha(noun, top, beginning, opening, creation) |
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| APA | Smart Define. (2015). opener thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/opener/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "opener thesaurus" https://smartdefine.org/opener/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, opener thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/opener/thesaurus/synonyms>. |
| MLA | Smart Define. "opener thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/opener/thesaurus/synonyms> |