| first(adjective, lower, opening, basic, old) | |
| foremost(adjective, first, forward) | |
| inaugural | |
| leading(adjective, past, first, forward, previous) | |
| older(adjective, senior, oldest) | |
| once(adjective, adverb, late, old, past) | |
| preexistent(adjective, earlier) | |
| prelusive(precedence, precursor) | |
| previously(adjective, adverb, first, forward, priority) | |
| then | |
| above(adjective, preposition) | |
| aforesaid(adjective, precedence, priority) | |
| anticipatory | |
| latest | |
| mendicant | |
| onetime | |
| pre-existing(adjective, priority) | |
| prevenient | |
| previous to(verb, phrasal verb) | |
| primary |
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| APA | Smart Define. (2015). prior thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/prior/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "prior thesaurus" https://smartdefine.org/prior/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, prior thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/prior/thesaurus/synonyms>. |
| MLA | Smart Define. "prior thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/prior/thesaurus/synonyms> |