Synonyms and related words :
Herculean, abstruse, arduous, asperous, barbellate, barfy, bearded, bewhiskered, bristled, bristling, bristly, brutal, bum, bushy, capillary, chancy, cheesy, cirrose, cirrous, comate, complex, complicated, confused, confusing, craggy, crappy, creepy, critical, crummy, dangerous, delicate, demanding, difficile, difficult, dirty, downy, exacting, fibered, fibroid, fibrous, flagelliform, fleecy, flocculent, flossy, fluffy, formidable, frightening, fringy, funicular, furry, fuzzy, glochidiate, godawful, goshawful, gossamery, grim, hairlike, hard, hard-earned, hard-fought, harsh, hazardous, hirsute, hispid, icky, intricate, jagged, jawbreaking, jeopardous, knotted, knotty, laborious, lanate, ligamental, matted, mean, nappy, nerve-racking, no picnic, not easy, operose, perilous, pilose, precarious, problematic, pubescent, punk, putrid, rigorous, risky, ropy, rough, rugged, scabrous, scary, scraggy, set with thorns, setaceous, setose, setous, severe, shagged, shaggy, shitty, silky, spiny, steep, stinking, stinky, strenuous, strigal, strigate, strigose, stringy, stubbled, stubbly, studded, taeniate, taeniform, tangled, thorny, threadlike, thready, ticklish, toilsome, tough, treacherous, trichoid, tricky, tufted, uncertain, uneven, unhealthy, unshaven, unshorn, unsmooth, unsound, uphill, vomity, whiskered, wicked, wiry, woolly, worrying, yecchy