gigantesque

[French, from Italian gigantesco, from gigante, giant, from Latin gigās, gigant-. See giant.]

adjective

Of extraordinary size and power: behemoth, Brobdingnagian, Bunyanesque, colossal, cyclopean, elephantine, enormous, gargantuan, giant, gigantic, herculean, heroic, huge, immense, jumbo, mammoth, massive, massy, mastodonic, mighty, monster, monstrous, monumental, mountainous, prodigious, pythonic, stupendous, titanic, tremendous, vast. Informal walloping. Slang whopping. See big/small/amount.