absolute, actual, adamant, adamantine, arduous, athletic, austere, beamy, beefy, brawny, burdensome, callous, chilly, coarse, cold-blooded, crude, cruel, despotic, difficult, dour, fast, ferocious, fierce, firm, forceful, formidable, grave, grievous, grim, hale, hard, hard-boiled, hard-core, hard-hearted, hardboiled, hardcore, hardhearted, harsh, healthy, hearty, heaviest, heavy, heavyweight, high, hulking, husky, imperative, inclement, inconsiderate, intense, intricate, irrespective, knotty, landed, logy, lusty, outrageous, pointed, ponderous, potent, powerful, raw, relentless, rigid, rigorous, robust, rugged, ruthless, serious, severe,
sinewy, stale, stalwart, stark, steady, stern, sternly, sternness, stiff, stiffly, stodgy, stout, strict, strictly, stringent, strong, strong-willed, strongman, sturdy, swingeing, tough, toughly, truculent, uncouth, unqualified, unquestioning, unreserved, vehement, violent, weighty, wiry