Thesaurus

abominable, adamantine, addled, al dente, alcoholic, ambitious, analyzable, arduous, atrocious, awful, awkward, backbreaking, bad, baffling, beardown, beefed-up, betting, bloody, bowelless, brawny, bullnecked, bullocky, Byzantine, calculating, calculative, callous, card-playing, case-hardened, catchy, challenging, coagulated, cold, colonial, complex, complicated, composite, compound, concentrated, concrete, congealed, conniving, convoluted, corked, corky, corneous, crappy, cutthroat, daedal, day-old, dead, decadent, decomposable, delicate, demanding, deplorable, desensitised, desensitized, difficult, disobedient, dissipated, distressing, dragging, dreadful, dry, dull, effete, effortful, embarrassing, epicurean, erect, evil, exacting, exhausting, exigent, fearful, fierce, firm, flyblown, fortified, fractious, frightful, gay, gluttonous, Gordian, granitelike, granitic, grueling, gruelling, hard, hard to please, hard-bitten, hard-boiled, hard-fought, hard-to-please, hardened, heavy, hedonic, hedonistic, hefty, herculean, hopeless, hornlike, horny, horrid, icky, ill, implacable, inclement, incompetent, indulgent, indurate, industrial-strength, insensible, insensitive, intemperate, interlacing, interlinking, interlocking, interwoven, intoxicant, intoxicating, intricate, involved, ironlike, jelled, jellied, knock-down, knockout, knotty, labor-intensive, labored, laborious, labour-intensive, laboured, labyrinthian, labyrinthine, lamentable, leaden, lignified, limp, lousy, luxuriant, luxurious, maggoty, mazy, mediocre, merciless, mischievous, moldy, mortal, mouldy, multifactorial, multiplex, muscular, musty, nasty, naughty, needy, negative, no-good, noticeable, numb, old, operose, ossified, overindulgent, pachydermatous, painful, pampering, petrified, petrous, pitiful, pitiless, plodding, poor, powerful, pretty, problematic, problematical, pugnacious, punishing, rancid, reinforced, remorseless, rigorous, robust, rocklike, rocky, rotten, rough, rubber, rugged, ruthless, sad, scheming, self-indulgent, semihard, semisolid, serious, set, severe, shrewd, sinewy, Sisyphean, solid, solid-state, solidified, sorry, soulless, spiritous, spirituous, spoiled, spoilt, sporting, stale, steely, stern, sticky, stiff, stinking, stinky, stonelike, stony, straining, strengthened, strenuous, strict, stringent, strong, surd, swingeing, sybaritic, tall, tangled, terrible, thick-skinned, thickening, thorny, ticklish, tigerish, tight, tightened, tiring, toilsome, tortuous, touchy, tough, tough-minded, tough-skinned, toughened, tricky, troublesome, trying, tumid, unaffected, uncompassionate, uncool, unenviable, unfavorable, unfavourable, unkind, unmerciful, unoriginal, unpitying, unresponsive, unsentimental, unskilled, unspeakable, unsuitable, unvoiced, unyielding, vehement, velar, vexed, virile, voiceless, voluptuary, voluptuous, weapons-grade, wearing, wearying, well-knit, well-set, wet, whispered, wilted, woody, worse, worst

hard is a ADJ.

firmly, hard, heavily, intemperately, severely

hard is a ADV.