| previously(adverb, back, late, earlier, then) | |
| once(adjective, adverb, past, earlier, precede) | |
| before(adverb, late, now, earlier, then) | |
| heretofore(adverb, earlier) | |
| already(adverb, earlier, precede, before) | |
| earlier(adverb, precede) | |
| erstwhile(adverb, earlier, precede) | |
| at one time(expression, idiom, adverb) | |
| begin with | |
| historically(adverb, historically) | |
| beforehand | |
| beforetime(adverb, earlier, precede, archaism) | |
| erst(adverb, the past) | |
| ago | |
| ahead | |
| anciently(adverb, the past) | |
| hitherto | |
| nee | |
| sooner | |
| then(adverb, before) |
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| APA | Smart Define. (2015). formerly thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/formerly/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "formerly thesaurus" https://smartdefine.org/formerly/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, formerly thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/formerly/thesaurus/synonyms>. |
| MLA | Smart Define. "formerly thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/formerly/thesaurus/synonyms> |