Synonyms for vast
modified
Large
huge, enormous, immense; see broad 1, large 1.
Extensive
broad, far-flung, wide, spacious, expansive, spread-out, ample, far-reaching, widespread, comprehensive, detailed, all-inclusive, astronomical, prolonged, stretched out, expanded.
Antonyms narrow*, limited, confined.
Infinite
boundless, limitless, interminable; see endless 1, eternal 2.
See vast 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, herculean, heroic, huge, immense, jumbo, mammoth, massive, massy, mastodonic, mighty, monster, monstrous, monumental, mountainous, prodigious, pythonic, stupendous, titanic, tremendous. (Informal) walloping. (Slang) whopping. See big
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