18
stupendous(adjective, great, big, grand, size)
17
mountainous(adjective, big, large, grand, huge)
15
great(adjective, big, large, grand, huge)
15
walloping(adjective, informal, big, large, grand)
14
Brobdingnagian(adjective, big, grand, huge, giant)
14
bulky(adjective, big, large, grand, huge)
14
cyclopean(adjective, big, large, grand, huge)
14
mighty(adjective, big, grand, size, huge)
14
towering(adjective, big, large, grand, huge)
14
voluminous(adjective, big, large, grand, huge)
13
extensive(adjective, big, large, grand, huge)
12
leviathan(adjective, big, large, grand, huge)
12
monster(adjective, big, grand, size, which)
11
ample(adjective, big, large, grand, huge)
11
capacious(adjective, big, large, grand, huge)
11
ginormous(adjective, great, big, large, grand)
11
herculean(adjective, strong, tough, severe, big)
11
hulking(adjective, big, large, grand, huge)
10
epic(adjective, grand, size, huge, over)
10
grand(adjective, big, large, size, huge)
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APASmart Define. (2016). gargantuan thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/gargantuan/thesaurus/synonyms
ChicagoSmart Define. 2016. "gargantuan thesaurus" https://smartdefine.org/gargantuan/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, gargantuan thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/gargantuan/thesaurus/synonyms>.
MLASmart Define. "gargantuan thesaurus" 26 February 2016. Web. 27 September 2026. <https://smartdefine.org/gargantuan/thesaurus/synonyms>