5
fab(adjective, unusual, strange, superb, wonderful)
5
gorgeous(adjective, attractive, comely, bonny, aesthetic)
5
heroic(adjective, big)
5
impressive(adjective, strong, great, powerful, superb)
5
inconceivable(adjective, unusual, strange, superb, wonderful)
5
king-size(adjective, huge, vast, copious)
5
massy(adjective, big, giant)
5
mind-boggling(adjective, wonderful, amazing, astonishing, overwhelming)
5
profound
5
superior(adjective, good, bad, great, sound)
5
thumping(adjective, great, big, huge)
5
titan(adjective, feature, characteristic, size)
5
voluminous(adjective, great, big, huge)
5
walloping(adjective, informal, big)
4
Bunyanesque(adjective, big, giant)
4
awful
4
boss(adjective, good, bad, strong, great)
4
boundless(adjective, absolute, huge, vast, endless)
4
bulky(adjective, strong, great, big, powerful)
4
first-rate
11 years ago|16k views|share |citing 
APASmart Define. (2015). stupendous thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/stupendous/thesaurus/synonyms
ChicagoSmart Define. 2015. "stupendous thesaurus" https://smartdefine.org/stupendous/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, stupendous thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/stupendous/thesaurus/synonyms>.
MLASmart Define. "stupendous thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/stupendous/thesaurus/synonyms>