2
important(adjective, great, extraordinary, unusual, famous)
2
momentous(adjective, great, extraordinary, superior, unusual)
2
observable(adjective, great, extraordinary, unusual, important)
2
rubric(great, extraordinary, unusual, outstanding, serious)
2
significant(adjective, great, extraordinary, superior, unusual)
2
unforgettable(adjective, great, extraordinary, outstanding, notable)
1
Saturnian(adjective, good, happiness, glad, success)
1
auspicious(adjective, important)
1
big-league(great, extraordinary, outstanding, serious, prominent)
1
blithe(adjective, good, happiness, glad, success)
1
bodacious(great, extraordinary, unusual, outstanding, serious)
1
boss(adjective, unusual, important, exceptional, remarkable)
1
catchy(great, extraordinary, outstanding, notable, unforgettable)
1
celebrated(adjective, great, extraordinary, outstanding, serious)
1
chancey(adjective, good, happiness, glad, success)
1
conspicuous(adjective, great, unusual, important, famous)
1
convivial(adjective, fun, celebration, fete)
1
cool(adjective, unusual, important, exceptional, remarkable)
1
critical(great, extraordinary, outstanding, notable, unforgettable)
1
crucial(great, extraordinary, outstanding, notable, unforgettable)
11 years ago|394 views|share |citing 
APASmart Define. (2015). red-letter thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/red-letter/thesaurus/synonyms
ChicagoSmart Define. 2015. "red-letter thesaurus" https://smartdefine.org/red-letter/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, red-letter thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/red-letter/thesaurus/synonyms>.
MLASmart Define. "red-letter thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/red-letter/thesaurus/synonyms>