30 entries under adjective topic. ×

7
operative
6
probatory
5
epoch-making
4
earthshaking
3
epochal
3
evidential
3
evidentiary
3
fundamental
3
key
3
momentous
3
monumental
3
noteworthy
3
portentous
3
probative
3
remarkable
3
world-shaking
3
world-shattering
2
gargantuan
2
large
2
prodigious
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APASmart Define. (2016). significant thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/significant/thesaurus/related
ChicagoSmart Define. 2016. "significant thesaurus" https://smartdefine.org/significant/thesaurus/related (accessed September 25, 2026).
HarvardSmart Define 2016, significant thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/significant/thesaurus/related>.
MLASmart Define. "significant thesaurus" 4 March 2016. Web. 25 September 2026. <https://smartdefine.org/significant/thesaurus/related>