110 entries under adjective topic. ×

7
big-league(importance, main, extremely significant)
7
essential(importance, main, extremely significant)
7
fateful(importance, main, extremely significant)
7
grand(importance, main, extremely significant)
7
grave(importance, main, extremely significant)
7
historical
7
monumental(great, extraordinary, important, outstanding)
7
remarkable(importance, main, extremely significant)
6
crucial(great, important, lively, significant)
6
exciting(importance, main, extremely significant)
6
relevant(importance, main, extremely significant)
5
ancient
5
celebrated(great, extraordinary, outstanding, remarkable)
5
chronological(record, history, chronology, timeline)
4
eventful(great, important, lively, significant)
4
major
4
noteworthy
4
unforgettable(great, extraordinary, outstanding, remarkable)
4
vintage(antique, old-time, oldfangled, old-school)
3
critical(great, important, lively, significant)
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APASmart Define. (2016). historic thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/historic/thesaurus/synonyms
ChicagoSmart Define. 2016. "historic thesaurus" https://smartdefine.org/historic/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, historic thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/historic/thesaurus/synonyms>.
MLASmart Define. "historic thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/historic/thesaurus/synonyms>