Synonyms of immense

1 Syllable

high, huge, vast, broad, great, big, giant, gross

2 Syllables

bigger, huger, moby, widest, monstrous, king-size, jumbo, hugest, mondo, outspread, greatest, massy, mammoth, bulky, bulkier, upstream, hard-won, fluctuant, hulky, whaling, boundless, endless, vastest, massiest, biggest, bulkiest, spacious, vaster, broadest, spread-out, turn-on, macro, wider, hulking, cosmic, super, massier, whaler, broader, scopic, mighty, full-out, untold, whopping, buller, zillion

3 Syllables

enormous, gigantic, prodigious, stupendous, colossal, far-ranging, pythonic, difficult, limitless, uncrowded, terrific, humongous, gargantuan, stretched-out, titanic, massive, tremendous, eternal, humungous, cyclopean, unbounded, walloping, leviathan, sky-scraping, unfixed, fabulous

4 Syllables

unlimited, difficile, behemothic, monolithic, cosmogonic, uncountable, extensive, larger-than-life, monumental, super-duper, bunyanesque, brobdingnagian, gigantesque, mastodonic, measureless, large-scale, unfathomed, cosmogonal, all-embracing, infinite

5 Syllables

elephantine, supertemporal, super-colossal, incomputable, unreckonable, unnumberable, uncalculable, immeasurable, incalculable, illimitable, interminable