Synonyms of weighty

1 Syllable
chief, fat, staid, gross, stout, trying
2 Syllables
heftier, fleshier, urgent, big-deal, stodgy, cumbrous, portly, two-ton, dense, zaftig, carking, fleshy, heaviest, profound, staider, puncher, meaty, bulky, bulkier, staidest, fattest, meatiest, big-gun, big-wheel, hot-dog, stoutest, beefy, cogent, beefier, hulky, meatier, grossest, tubby, stouter, grosser, telling, solemn, clunker, bulkiest, valid, fatter, trenchant, pointful, chiefest, heavier, somber, hulking, heavy, hefty, grievous, grossed, taxing, serious, sarcous, salient, stodgier, namest, hotdog, namer, rotund
3 Syllables
important, demanding, relevant, unwieldy, influential, long-faced, onerous, unsmiling, powerful, called-for, substantial, labored, backbreaker, potbellied, forcible, momentous, obese, meaningful, overfed, porcine, conformant, gilt-edged, overweight, corpulent, massive, exacting, profoundest, well-padded, embonpoint, galumphing, ponderous, bigtime, forceful
4 Syllables
suasive, high-powered, burdensome, unhumorous, overtaxing, top-priority, oppressive, jelly-belly, whalelike, overstuffed, depressive, persuasive, significant, convictive, ponderable, consequential, predominant, cumbersome, jellybelly, remarkable
5 Syllables
superincumbent, applicative, applicatory