13
eye-opening(adjective, astonishing, awful, amazing, astounding)
13
massive(adjective, great, big, huge, lofty)
13
phenomenal(adjective, good, unusual, strange, superb)
12
super(adjective, good, bad, great, sound)
12
astonishing(adjective, wonderful, amazing, marvelous, fantastic)
12
astounding(adjective, wonderful, fantastic, amazing, marvelous)
12
miraculous(adjective, amazing, wonderful, good, pleasant)
12
sensational(adjective, cool, great, pleasant, keen)
12
wondrous(adjective, amazing, fantastic, wonderful, marvelous)
11
Brobdingnagian(adjective, big, huge, vast, giant)
11
giant(adjective, great, big, size, huge)
11
splendid(adjective, bad, great, pleasant, fine)
10
excellent(adjective, good, bad, great, sound)
10
magnificent(adjective, strong, great, powerful, superb)
10
marvellous
10
stunning(adjective, amazing, wonderful, fantastic, astonishing)
9
cyclopean(adjective, big, giant)
9
monster(noun, adjective, big, wonderful, amazing)
8
grand(adjective, strong, great, big, powerful)
8
noteworthy(adjective, wonderful, exceptional, marvelous, terrific)
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>