Synonyms of biggest

1 Syllable

bull, fat, huge, vast, max, most, full

2 Syllables

largest, copious, hefty, strapping, spacious, monster, packed, awash, burly, husky, brimming, chock-full, jumbo, crowded, roomy, stuffed, mostest, ample, mondo, hulking, whopping, whopper, mammoth, bulky

3 Syllables

tremendous, maximal, maximum, humongous, enormous, sizable, gigantic, capacious, commodious, ponderous, prodigious, immense, walloping, colossal, thundering, substantial, maximums, massive, heavyweight

4 Syllables

heavy-duty, oversize, voluminous, extensive

5 Syllables

considerable