| archean | |
| archeozoic | |
| archival | |
| arctic | |
| arrested | |
| artless | |
| astern | |
| asunder | |
| asynchronous | |
| at | |
| at an earlier date | |
| atavistic | |
| atrocious | |
| attrited | |
| auld langsyne | |
| auspicious | |
| average | |
| averse | |
| awful | |
| awol |
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| APA | Smart Define. (2015). past thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/past/thesaurus/related |
| Chicago | Smart Define. 2015. "past thesaurus" https://smartdefine.org/past/thesaurus/related (accessed September 27, 2026). |
| Harvard | Smart Define 2015, past thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/past/thesaurus/related>. |
| MLA | Smart Define. "past thesaurus" 25 May 2015. Web. 27 September 2026. <https://smartdefine.org/past/thesaurus/related> |