Synonyms of massive

1 Syllable

huge, vast, grand, great, big, thick, gross

2 Syllables

heftier, bigger, huger, bloater, big-deal, moby, monster, cumbrous, two-ton, king-size, heaviest, hugest, mondo, massy, mammoth, bulky, bulkier, thicker, beetler, blobber, sagger, hulky, whaling, solid, grossest, bagger, vastest, grosser, massiest, bilger, clunker, biggest, bulkiest, vaster, cracking, spread-out, weightier, weighty, macro, heavier, hulking, massier, whaler, heavy, hefty, well-done, grossed, mighty, thickest, poucher, whopping, goodly, largish, goodliest, buller

3 Syllables

statelier, unwieldy, enormous, gigantic, prodigious, colossal, substantial, imposing, pythonic, ginormous, sizeable, overfed, towering, gargantuan, stretched-out, titanic, immense, stately, overweight, tremendous, towery, fearsome, mountainous, cyclopean, humungous, sizable, galumphing, ponderous, walloping, leviathan

4 Syllables

impressive, voluminous, astronomic, overstuffed, behemothic, oversized, extensive, larger-than-life, ponderable, monumental, super-duper, bunyanesque, gigantesque, mastodonic, cumbersome, large-scale, decent-sized

5 Syllables

elephantine, super-colossal, astronomical