192 entries under significant topic. ×

2
extraordinary(adjective, great, solid, superior, unusual)
2
far-reaching(adjective, severe, important, substantial)
2
fundamental(adjective, important, substantial, serious)
2
major-league(strong, important, powerful, large)
2
marked(adjective, great, solid, extraordinary, superior)
2
much(substantial, large)
2
ominous(adjective, heavy, acute, dangerous)
2
paramount(adjective, good, big, important)
2
phenomenal(adjective, bad, great, excellent, solid)
2
preeminent(adjective, bad, great, excellent, solid)
2
red-letter(adjective, great, extraordinary, superior, unusual)
2
standout(adjective, bad, great, excellent, extraordinary)
2
super(adjective, good, bad, great, extraordinary)
2
superior(adjective, bad, great, excellent, unusual)
2
valuable(adjective, big, substantial, large)
1
abundant(substantial, large, considerable)
1
acute(adjective, heavy, important, serious)
1
all-important(adjective, serious, essential, critical)
1
arresting(adjective, solid, intense, extraordinary, unusual)
1
arrestive(adjective, solid, extraordinary, unusual, strange)
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APASmart Define. (2016). momentous thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/momentous/thesaurus/synonyms
ChicagoSmart Define. 2016. "momentous thesaurus" https://smartdefine.org/momentous/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, momentous thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/momentous/thesaurus/synonyms>.
MLASmart Define. "momentous thesaurus" 1 April 2016. Web. 30 September 2026. <https://smartdefine.org/momentous/thesaurus/synonyms>