4
voluminous(adjective, great, big, huge, immense)
3
awful
3
behemoth(adjective, big)
3
capacious(adjective, great, big, huge, immense)
3
commemorative
3
consequential(adjective, important)
3
considerable(adjective, strong, great, big, important)
3
cosmic
3
epic
3
exalted(adjective, outstanding, grand, impressive, royal)
3
galactic
3
leviathan
3
noble(adjective, great, intense, powerful, marvelous)
3
notable(adjective, strong, great, intense, extraordinary)
3
noteworthy
3
overwhelming(adjective, great, noble, grand, striking)
3
palatial(adjective, grand, opulent)
3
permanent
3
planetary
3
prominent
10 years ago|10k views|share |citing 
APASmart Define. (2016). monumental thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/monumental/thesaurus/synonyms
ChicagoSmart Define. 2016. "monumental thesaurus" https://smartdefine.org/monumental/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, monumental thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/monumental/thesaurus/synonyms>.
MLASmart Define. "monumental thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/monumental/thesaurus/synonyms>