Herculean, monster, monumental, Brobdingnagian, mastodonic, whopping, pythonic, Bunyanesque, behemoth, monstrous, walloping, Cyclopean, heroic, jumbo, gigantesque, stupendous, mountainous, titanic, mighty, massy
large (part of speech: adjective)
extensive, sizable, ample, lofty, magnificent, colossal, soaring, majestic, giant, enormous, big, voluminous, immense, huge, copious, awesome, gigantic, generous, expansive, baggy, large, bulky, capacious, impressive, towering, grandiose, cavernous, mammoth, comprehensive, tremendous, prodigious, roomy, vast, massive, humongous, elephantine, grand, princely, spacious, great
- Such Gargantuan smugness takes one's breath away. - "The Keeper of the Door", Ethel M. Dell.
- Evidently the captain meant to add certain explanatory remarks which would account for that Gargantuan tickling. - "The Wheel O' Fortune", Louis Tracy.
- Johnson at midnight outside the Temple roaring with Gargantuan laughter that echoed from Temple Bar to what we now call Ludgate Circus is a picture his wisest admirers would be slowest to forget. - "Dr. Johnson and His Circle", John Bailey.