Synonyms and related words :
Herculean, Spartan, Spartanic, abstruse, adamantine, arduous, asperous, astringent, austere, authoritarian, beefy, bitter, bold, bouncing, brawny, broken, brutal, bulky, bumpy, burdensome, burly, churlish, clownish, cockled, cockly, complex, corrugate, corrugated, cragged, craggy, creased, crimped, crimpy, crinkled, crinkly, critical, crude, crumpled, delicate, demanding, dense, difficile, difficult, doughty, dour, dry, durable, enduring, exacting, exigent, firm, flush, forceful, forcible, forcy, formidable, full-blooded, full-strength, furrowed, grating, gravelly, grim, gutsy, gutty, hairy, hale, hale and hearty, hard, hard as nails, hard-earned, hard-fought, hardy, harsh, hearty, heavy, hefty, hoarse, husky, ill-bred, inclement, independent, individualistic, intemperate, intricate, iron-hard, ironbound, irregular, jagged, jaggy, jarring, jawbreaking, knitted, knotted, knotty, laborious, lasting, loutish, lubberly, lumpish, lusty, massive, mean, meticulous, mighty, muscular, nervy, no picnic, not easy, obstinate, onerous, operose, pitted, potent, powerful, puckered, puckery, puissant, pursed, pursy, ragged, rasping, raucous, red-blooded, ridged, rigorous, rimpled, rippled, robust, robustious, robustuous, rockbound, rocky, rough, rough-and-ready, rucked, rude, rugose, rugous, rumpled, saw-toothed, sawtooth, scabrous, scragged, scraggly, scraggy, self-confident, self-reliant, self-sufficient, serrate, serrated, set with thorns, severe, snagged, snaggled, snaggy, solid, sound, spiny, stable, stalwart, steady, steely, steep, stern, stony, stout, strapping, strenuous, strict, stridulous, stringent, strong, strong as brandy, strong as strong, strong-willed, sturdy, thorny, ticklish, toilsome, tough, tricky, uncivilized, uncouth, uncultured, uneven, ungentle, ungraceful, unlevel, unpolished, unrefined, unsmooth, unsparing, unyielding, uphill, vigorous, vital, well-built, well-constructed, well-founded, well-grounded, well-made, wicked, wrinkled, wrinkly