64 entries under great topic. ×

48
important(adjective, good, bad, strong)
39
significant(adjective, good, clear, strong)
30
serious(adjective, good, severe, extraordinary)
25
crucial(adjective, tough, severe, extraordinary)
20
memorable(adjective, extraordinary, superior, importance)
19
critical(adjective, severe, extraordinary, big)
19
major(adjective, bad, tough, severe)
15
impressive(adjective, bad, strong, excellent)
13
noteworthy(adjective, solid, extraordinary, big)
12
meaningful(adjective, good, clear, strong)
11
eventful(adjective, bad, excellent, extraordinary)
11
signal(adjective, solid, extraordinary, importance)
10
decisive(adjective, extraordinary, big, important)
9
chief(adjective, bad, excellent, superior)
7
principal(adjective, good, bad, excellent)
7
special(adjective, bad, excellent, superior)
6
capital(adjective, bad, excellent, important)
6
main(adjective, good, bad, excellent)
5
distinguished(adjective, bad, excellent, extraordinary)
5
eminent(adjective, good, bad, excellent)
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APASmart Define. (2016). momentous thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/momentous/thesaurus/synonyms
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>