Brobdingnagian, monster, heroic, abundant, study at enormous, massy, considerable, gigantesque, behemoth, jumbo, monumental, Cyclopean, pythonic, monstrous, coarse, mastodonic, Bunyanesque, mighty, broad, walloping, titanic, mountainous, whopping, Herculean, long, commodious, wide, stupendous
large (part of speech: adjective)
extensive, sizable, ample, lofty, magnificent, colossal, soaring, majestic, generous, enormous, big, voluminous, immense, huge, copious, awesome, giant, gargantuan, expansive, baggy, large, bulky, capacious, impressive, towering, grandiose, cavernous, mammoth, comprehensive, tremendous, prodigious, roomy, vast, massive, humongous, elephantine, grand, princely, spacious, great
- Sometimes his gigantic servant wandered about the house at night. - "Tom Swift and his Electric Locomotive or, Two Miles a Minute on the Rails", Victor Appleton.
- And above all, the gigantic bones which they beheld lying around in every direction, gave them a feeling of disgust; it seemed as if an army of animals had taken refuge in this solitary island only to die there. - "The Waif of the "Cynthia"", André Laurie and Jules Verne.
- These gigantic works are the works of despair. - "The Birth-Time of the World and Other Scientific Essays", J. (John) Joly.