Synonyms for Giant:

adj.

large (adjective)
expansive, towering, grandiose, magnificent, copious, soaring, awesome, gigantic, large, tremendous, ample, big, huge, voluminous, mammoth, immense, colossal, gargantuan, massive, sizable, grand, great, impressive, enormous, comprehensive, elephantine, bulky, baggy, roomy, spacious, cavernous, humongous, lofty, prodigious, capacious, princely, generous, extensive, vast, majestic.
very large (adjective)
gargantuan, mammoth, enormous, colossal, humongous, gigantic, elephantine, prodigious, immense, jumbo, vast, huge, big.

n.

agency, affiliate, agent, base, big business, anchor, the biz, acquisition, account, blue-chip. hotshot, leviathan, high-flier, performer, success story, superwoman, survivor, whopper, top dog, boy wonder, beings, leader. manikin, gamine, amazon, he-man, beanpole, mannikin, brute. aquatic, anthropoid, arboreal, asexual, captive, articulate, best-of-breed, androgynous, amphibious, Caged. cowboy, changeling, cupid, dracula, elf, cyclops, Dorian Gray, arthurian, arthur, Dick and Jane. high, wide. colossus (noun)
leviathan, titan, cyclops.
extremely large person (noun)
goliath, cyclops, hulk, monster, titan, leviathan, whopper, colossus, behemoth, whale.
giant (noun)
gargantuan, titan, heavyweight, hulk, behemoth, big, goliath, large, jumbo, giant star, colossus, whale, elephantine, monster.

Other synonyms:

leviathan, gamine, he-man, beanpole, amazon. manikin, whopper, brute. tall
high.
Other relevant words:
cyclops, manikin, beanpole, behemoth, giant star, titan, goliath, monster, high, heavyweight, leviathan, whale, colossus, brute, jumbo, hulk, whopper, amazon.

Usage examples for giant

  1. Dat giant don't know what he's about half de time." – Tom Swift and his Electric Locomotive or, Two Miles a Minute on the Rails by Victor Appleton
  2. Then turning to the invisible club, he said, " Press forward, my invisible club; strike your best, and rid the earth of this wicked giant – Fairy Tales of the Slav Peasants and Herdsmen by Alexander Chodsko
  3. And he fell to weeping, and while he stood there weeping, the giant came up. – Eskimo Folktales by Unknown