25 entries under serious topic. ×

5
major-league(adjective, great, excellent, heavy, important)
3
prominent(adjective, important, outstanding, large)
2
celebrated(great, important, outstanding, prominent)
1
celebrious(important, outstanding, prominent, distinguished)
1
conspicuous(important, outstanding, significant, prominent)
1
eventful(great, extraordinary, outstanding, prominent)
1
famed(great, important, outstanding, prominent)
1
heavy(great, extraordinary, significant, prominent)
1
high-profile(great, important, outstanding, prominent)
1
important famous(expression, great, important, outstanding)
1
marked(outstanding, significant, prominent, vital)
1
memorable(adjective, outstanding, significant, prominent)
1
observable(great, extraordinary, outstanding, prominent)
1
preeminent(great, important, outstanding, prominent)
1
red-letter(great, extraordinary, outstanding, prominent)
1
rubric(great, extraordinary, outstanding, prominent)
1
top-drawer(great, extraordinary, outstanding, prominent)
1
well-known(great, important, outstanding, prominent)
0
bodacious(adjective, great, unusual, important, significant)
0
evident(outstanding, prominent, distinguished)
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APASmart Define. (2015). big-league thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/big-league/thesaurus/synonyms
ChicagoSmart Define. 2015. "big-league thesaurus" https://smartdefine.org/big-league/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, big-league thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/big-league/thesaurus/synonyms>.
MLASmart Define. "big-league thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/big-league/thesaurus/synonyms>