| estimate | |
| estimation | |
| exam(noun, check, approval, examination, standard) | |
| exponential | |
| extension | |
| figure | |
| final(noun, check, approval, examination, standard) | |
| genesis(start, beginning, onset, origination, initiation) | |
| graduation(start, beginning, onset, origination, initiation) | |
| hold | |
| hour | |
| innumerate | |
| inquest(noun, check, approval, examination, standard) | |
| inquiry(noun, check, approval, examination, standard) | |
| inspection(noun, check, approval, examination, standard) | |
| instigation(start, beginning, origination) | |
| investigation(noun, check, approval, examination, standard) | |
| lead-in(noun, approach, kickoff, warm-up) | |
| locus | |
| mathematician |
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| APA | Smart Define. (2013). countdown thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/countdown/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "countdown thesaurus" https://smartdefine.org/countdown/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2013, countdown thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/countdown/thesaurus/synonyms>. |
| MLA | Smart Define. "countdown thesaurus" 17 June 2013. Web. 21 September 2026. <https://smartdefine.org/countdown/thesaurus/synonyms> |