Synonyms of heavy

1 Syllable: squat, firm, huge, slow, neb, firms, strong, loud, fat, big, fraught, splay, thick, gross, stout, splayer, built, lead
2 Syllables: heftier, choky, joyless, fleshier, firmest, urgent, overs, big-deal, stodgy, slowest, soggy, awkward, stifling, amplest, cumbrous, laden, portly, two-ton, zaftig, mental, sensual, roiled, fleshy, scorchin, profound, arduous, drowsy, gravest, firmer, stodgier, bushier, preggers, cloudier, copious, bulky, drowsier, bulkier, mopey, chunky, dopy, weighted, gravid, slugger, fattest, irons, carking, thicker, upstream, loaded, hard-won, puissant, stoutest, gloppy, torpid, beefy, smoggiest, dopey, strongest, rocker, bushy, beefier, hulky, ferric, ampler, stand-out, turbid, roily, cloudy, solid, ferrous, grossest, dragger, tubby, stouter, sleepy, sluggers, nodding, grueling, pregnant, grosser, dopier, sullen, solemn, cloudiest, parlous, clunker, bulkiest, languid, chokier, stuffy, parous, jousters, drowsiest, fatter, forter, sluggish, densest, steeler, graver, clumsy, stuffiest, weighty, clumsier, stretchy, doozie, hulking, denser, mopish, dozy, jellied, large, hefty, warlord, plenteous, grievous, grossed, taxing, snoozy, soggier, fighters, smoggy, thickest, stuffier, mooney, slower, sarcous, fighter, iron, roaring, dozier, paunchy, vital, squattest, ample, listless, stronger, splasher, stolid, louder, loudest, rotund, sleepier, duelist, jouster
3 Syllables: important, notable, full-bodied, hellacious, unwieldy, hot-blooded, high-power, lead-footed, parturient, top-heavy, nameable, celebrious, gestating, abundant, oppressed, ham-handed, grim-faced, ill-shaped, onerous, sobering, vixenish, enceinte, called-for, substantial, labored, criminals, distingue, leadfooted, lumbering, effortful, potbellied, difficult, stuporous, fine-grained, psychical, nonporous, outlawed, momentous, obese, life-or-death, meaningful, little-known, criminal, jeopardous, overfed, lowering, perfervid, slumbery, languorous, porcine, appalling, dangerous, sleepyhead, close-knit, slumberous, vitrified, illicit, illustrious, somnific, distingué, overweight, corpulent, massive, laborious, lymphatic, abstruse, profoundest, expectant, lethargic, well-padded, embonpoint, galumphing, ponderous, outsize, illegal, ear-piercing, ear-splitting, full-mouthed, loud-voiced, foremost, fullmouthed
4 Syllables: burdensome, troublesome, heavy-footed, tiresome, unamusing, overtaxing, top-priority, oppressive, jelly-belly, difficile, whalelike, passionate, close-grained, overstuffed, telepathic, elevated, miraculous, depressive, coal-and-ice, name-of-the-game, emulsified, excessive, dangersome, boresome, esoteric, significant, somniferous, indictable, somnifacient, ponderable, memorable, infestive, subliminal, sleepyheaded, cumbersome, extralegal, recondite, heavy-duty, jellybelly, noteworthy, wonderworking, high-profile, major-league, person-at-arms
5 Syllables: elephantine, unventilated, superincumbent, considerable, incompressible, ideological, plenitudinous, sedimentary, enervative, extraordinary, unmanageable, tortoiselike, hebetudinous, animalistic