Synonyms of gargantuan

1 Syllable

fat, huge, vast, big, giant

2 Syllables

huger, massiest, massy, fattest, moby, upstream, monstrous, hard-won, fatter, whaling, jumbo, whopping, hugest, whaler, mondo, hulking, tubby, mammoth, massier

3 Syllables

tremendous, potbellied, mountainous, humungous, cyclopean, pythonic, humongous, difficult, towering, enormous, titanic, gigantic, prodigious, walloping, immense, herculean, colossal, leviathan, massive, heavyweight

4 Syllables

monumental, jelly-belly, difficile, whalelike, super-duper, bunyanesque, gigantesque, mastodonic, behemothic, jellybelly, monolithic, larger-than-life

5 Syllables

elephantine, super-colossal