Synonyms For "Big" :
1 syllable:
bad, broad, deep, grand, great, grown, huge, large, loud, swelled, vast, wide
2 syllables:
adult, ample, banging, bigger, biggish, boastful, bouffant, braggart, bragging, braggy, bulky, cosmic, crowing, double, enceinte, enlarged, epic, freehanded, giant, giving, gravid, grownup, handsome, heavy, hulking, hulky, immense, intense, jumbo, larger, largish, macro, mammoth, massive, monstrous, outsize, outsized, plumping, puffy, rangy, spacious, super, thumping, too large, volumed, whacking, whopping, with child
3 syllables:
bighearted, boastfully, bounteous, bountiful, capacious, colossal, enormous, expectant, extended, extensive, fully grown, galactic, gigantic, heroic, humongous, important, liberal, lifesize, mountainous, of import, openhanded, overlarge, oversize, oversized, prodigious, prominent, sizable, sizeable, stupendous, titanic, tremendous, vauntingly, walloping
4 syllables:
astronomic, conspicuous, elephantine, gargantuan, macroscopic, magnanimous, monolithic, monumental, vainglorious, voluminous