adamant, adamantine, arduous, austere, awkward, balance, beamy, big, bitterly, burdensome, callous, capital, chilly, coarse, compelling, composed, considerable, conspicuous, crude, cumbersome, deep, deep-seated, demure, difficult, distinct, distinguished, earnest, effective, eminent, firm, formidable, good, grave, gravity, great, grievous, gross, gusher, hard,
hard-boiled, hard-core, hardboiled, hardcore, harsh, heaviest, heavily, heavy, heavyweight, heft, high, hulking, illustrious, importance, important, inclement, inconvenient, ingenious, intricate, intrinsic, knotty, landed, leading, libra, logy, majored, marked, material, moment, momentous, mournful, notability, notable, noted, noteworthy, onerous, oppressive, outrageous, outstanding, penetrating, pointed, ponderous, pre-eminent, profound, prominence, prominent, quintessential, raw, remarkable, reputable, rigid, rigorous, rugged, salient, scale, serious, seriousness, severe, solemn, solid, sound, staid, stark, stern, sternly, sternness, stiff, stiffly, stodgy, stone, strenuously, strict, strictly, stringent, strong, substantial, superb, superior, swell, thick, thoughtful, tough, toughly, troublesome, uncouth, uphill, valid, vastly, vital, weigh, weight, weighty, wistful