Thesaurus

Synonyms for Weighty include:

abdominous, all important, all-important, alpha, beta, big, blubbery, burdensome, burning, buxom, cardinal, central, chief, chubby, coaxing, cogent, compact, compelling, consequential, convincing, Copernican, corpulent, crucial, distinguished, distressful, distressing, disturbing, double-chinned, dumpy, embonpoint, eminent, endomorphic, essential, eventful, fat, fattish, fleshy, fundamental, glib, glib-tongued, grand, grave, great, grievous, gross, heavy, heavyset, historic, important, in-chief, ingratiatory, jowly, key, leaden, loose-jowled, main, measurable, most-valuable, obese, of import, of the essence, onerous, oppressive, outstanding, overweight, paunchy, persuasive, perturbing, plump, podgy, porcine, portly, potbellied, primal, primary, principal, pudgy, pyknic, roly-poly, rotund, rounded, serious, significant, smooth-tongued, stocky, stout, strategic, taxing, telling, thick, thickset, troubling, tubby, valuable, weighted, weighty, worrisome, worrying, zaftig, zoftig

weighty is a ADJ.