See herculean in Webster's New World Roget's A-Z Thesaurus II
adjective
Of extraordinary size and power:
behemoth, Brobdingnagian, Bunyanesque, colossal, cyclopean, elephantine, enormous, gargantuan, giant, gigantesque, gigantic, 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
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