Synonyms of large-scale

1 Syllable
vast, bull, fat, huge, great, good, full
2 Syllables
heftier, large, hefty, strapping, spacious, monster, major, widest, scopic, packed, healthy, bulker, awash, burly, husky, brimming, chock-full, jumbo, crowded, roomy, stuffed, world-wide, macro, ample, mondo, outspread, hulking, wider, masser, whopping, copious, whopper, mammoth, bulky
3 Syllables
tremendous, massive, humongous, sizable, commodious, enormous, capacious, gigantic, ponderous, prodigious, immense, walloping, catholic, colossal, far-ranging, thundering, substantial, heavyweight
4 Syllables
heavy-duty, oversize, voluminous, extensive, unsectarian
5 Syllables
unexclusive, considerable