5
imposing(adjective, strong, powerful, high, excessive)
5
king-size(adjective, large, huge, vast, copious)
5
leviathan
5
massy(adjective, big, giant)
5
princely(adjective, large, grand, impressive, overwhelming)
5
sizable(adjective, great, big, large, huge)
5
soaring(adjective, great, big, high, large)
5
strapping(adjective, strength)
5
substantial(adjective, great, big, huge)
4
Bunyanesque(adjective, big, giant)
4
boundless(adjective, huge, vast, immense, massive)
4
copious(adjective, great, big, large, huge)
4
cosmic
4
epic
4
impressive(adjective, strong, powerful, high, large)
4
majestic(adjective, large)
4
monolithic(adjective, massive)
4
vasty(adjective, size)
4
weighty
3
astronomical(adjective, huge)
10 years ago|21k views|share |citing 
APASmart Define. (2016). gigantic thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/gigantic/thesaurus/synonyms
ChicagoSmart Define. 2016. "gigantic thesaurus" https://smartdefine.org/gigantic/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, gigantic thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/gigantic/thesaurus/synonyms>.
MLASmart Define. "gigantic thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/gigantic/thesaurus/synonyms>