Synonyms|659Antonyms|114|Broader|10Narrower|15Related|819

66 entries under main topic. ×

15
impressive(adjective, bad, strong, great, excellent)
15
outstanding(adjective, excellent, extraordinary, superior, importance)
15
solemn(adjective, importance, valuable, notable)
14
historic(adjective, importance, important, extremely significant)
12
grand(adjective, importance, valuable, notable)
12
meaningful(adjective, good, clear, strong, great)
11
responsible(adjective, importance, valuable, duty, reliable)
10
big-league(adjective, importance, valuable, notable)
10
earnest(adjective, importance, important, valuable)
10
key(adjective, importance, valuable, notable)
9
bigwig(adjective, importance, valuable, notable)
9
chief(adjective, bad, great, excellent, superior)
8
exciting(adjective, importance, valuable, notable)
8
newsworthy(adjective, importance, important, valuable)
8
purposeful(adjective, importance, valuable, notable)
7
big shot(adjective, importance, valuable, notable)
7
big time(adjective, importance, extremely significant)
7
challenging(adjective, importance, valuable, notable)
7
constitutive(adjective, importance, valuable, notable)
7
donnish(adjective, importance, valuable, notable)
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ChicagoSmart Define. 2016. "momentous thesaurus" https://smartdefine.org/momentous/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2016, momentous thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/momentous/thesaurus/synonyms>.
MLASmart Define. "momentous thesaurus" 1 April 2016. Web. 1 October 2026. <https://smartdefine.org/momentous/thesaurus/synonyms>