Word Study
gargantuan
CIDE DICTIONARY
gargantuan, a. [From Gargantua, an allegorical hero of Rabelais.].
Characteristic of Gargantua, a gigantic, wonderful personage; enormous; prodigious; inordinate. [1913 Webster]
OXFORD DICTIONARY
gargantuan, adj. enormous, gigantic.
Etymology
the name of a giant in Rabelais' book Gargantua (1534)
THESAURUS
gargantuan
Atlantean, Brobdingnagian, Cyclopean, Herculean, Homeric, abysmal, amplitudinous, astronomic, astronomical, awesome, boundless, bulky, colossal, cosmic, elephantine, enormous, epic, extensive, galactic, giant, giantlike, gigantic, heroic, huge, immeasurable, immense, infinite, jumbo, king-size, large, mammoth, massive, massy, mighty, monster, monstrous, monumental, mountainous, outsize, overgrown, prodigious, profound, sizable, spacious, stupendous, titanic, towering, tremendous, vast, voluminous, weightyROGET THESAURUS
gargantuan
Size
N size, magnitude, dimension, bulk, volume, largeness, greatness, expanse, amplitude, mass, proportions, capacity, tonnage, tunnage, cordage, caliber, scantling, turgidity, corpulence, obesity, plumpness, embonpoint, corporation, flesh and blood, lustihood, hugeness, enormity, immensity, monstrosity, giant, Brobdingnagian, Antaeus, Goliath, Gog and Magog, Gargantua, monster, mammoth, Cyclops, cachalot, whale, porpoise, behemoth, leviathan, elephant, hippopotamus, colossus, tun, cord, lump, bulk, block, loaf, mass, swad, clod, nugget, bushel, thumper, whooper, spanker, strapper, Triton among the minnows, mountain, mound, heap, largest portion, full size, life size, large, big, great, considerable, bulky, voluminous, ample, massive, massy, capacious, comprehensive, spacious, mighty, towering, fine, magnificent, corpulent, stout, fat, obese, plump, squab, full, lusty, strapping, bouncing, portly, burly, well-fed, full-grown, corn fed, gram fed, stalwart, brawny, fleshy, goodly, in good case, in good condition, in condition, chopping, jolly, chub faced, chubby faced, lubberly, hulky, unwieldy, lumpish, gaunt, spanking, whacking, whopping, walloping, thumping, thundering, hulking, overgrown, puffy, huge, immense, enormous, mighty, vast, vasty, amplitudinous, stupendous, monster, monstrous, humongous, monumental, elephantine, jumbo, mammoth, gigantic, gigantean, giant, giant like, titanic, prodigious, colossal, Cyclopean, Brobdingnagian, Bunyanesque, Herculean, Gargantuan, infinite, large as life, plump as a dumpling, plump as a partridge, fat as a pig, fat as a quail, fat as butter, fat as brawn, fat as bacon, immeasurable, unfathomable, unplumbed, inconceivable, unimaginable, unheard-of, of cosmic proportions, of epic proportions, the mother of all, teh granddaddy of all.For further exploring for "gargantuan" in Webster Dictionary Online