Synonyms and related words :
Herculean, Philistine, about, absolute, abstruse, accented, acerb, acerbic, acrid, acrimonious, actively, acute, adamant, adamantine, addictive, adverse, afflictive, agonizing, agonizingly, alcoholic, all but, almost, along toward, alveolar, amaroidal, anesthetic, angry, antagonistic, apical, apico-alveolar, apico-dental, approximately, ardent, ardently, arduous, arduously, around, articulated, assiduous, assiduously, assimilated, astringent, at close quarters, at hand, atrocious, austere, avid, back, backbreaking, bad, badly, baffling, bankrupt, bare, barytone, bec et ongles, beefy, beyond one, bilabial, biting, bitter, bitter as gall, bleak, bloodless, blunt, bony, bothersome, bouncing, bowelless, brazen, broad, broke, brutal, brutish, bulky, burdensome, businesslike, busted, cacuminal, calamitous, calculating, callous, calloused, carefully, cartilaginous, case-hardened, cast-iron, caustic, cement, cemental, central, cerebral, checked, chewy, clear, close, close about, close at hand, close by, close-knit, close-textured, close-woven, coarse, cohesive, cold, cold of heart, coldblooded, coldhearted, compact, compacted, complex, complicated, compressed, concentrated, concrete, condensed, conditioning, conflicting, congested, conscienceless, conscientious, conscientiously, consolidated, consonant, consonantal, continuant, contrary, cool, coriaceous, corneous, counter, counteractive, crabbed, crammed, crammed full, cramp, cramping, critical, crowded, cruel, dark, deep, deeply, definite, delicate, demanding, dense, dental, despotic, determinedly, detrimental, devastating, devoted, devotedly, dictatorial, difficile, difficult, diligent, diligently, disastrous, dispassionate, dissimilated, distinct, distressing, distressingly, dog-eat-dog, dogged, doggedly, dorsal, doughty, dour, down-to-earth, dull, durable, dure, dynamically, eager, eagerly, earnestly, effortful, effortfully, enduring, energetic, energetically, enigmatic, exacting, excruciating, exhausting, factual, fast by, fatiguing, fervent, fibrous, firm, flat, flinthearted, flintlike, flinty, forceful, forcefully, forcible, forcibly, forcy, formidable, front, full-blooded, full-strength, fundamentalist, garbled, genuine, glide, glossal, glottal, gluey, gnawing, granitelike, granitic, grave, grievous, grim, grinding, griping, gristly, gutsy, guttural, gutty, habit-forming, habituating, hairy, hale, hammer and tongs, hard as nails, hard by, hard of heart, hard to understand, hard up, hard-bitten, hard-boiled, hard-core, hard-earned, hard-fought, hard-nosed, hard-set, hardened, hardheaded, hardhearted, hardworking, hardy, harmful, harrowing, harsh, harshly, heart and soul, heartily, heartless, hearty, heavy, hefty, hereabout, hereabouts, hidebound, high, horny, hostile, hurtful, hurting, husky, ill, immovable, immutable, impassible, impecunious, impenetrable, impenitent, impermeable, impervious, implacable, impliable, impoverished, impregnable, in opposition, in spitting distance, in the red, inclement, incomprehensible, incontestable, incontrovertible, indefatigable, indefatigably, indigent, indisputable, indurate, indurated, industrious, industriously, inelastic, ineluctable, inescapable, inexorable, inflexible, inhuman, inimical, inscrutable, insensate, insensitive, insolent, insoluble, intemperate, intense, intensely, intent, intently, intonated, intractable, intransigent, intricate, inured, involved, irksome, iron, iron-hard, ironbound, ironclad, ironhanded, ironlike, irreconcilable, jam-packed, jammed, jawbreaking, jumbled, keen, knotted, knotty, labial, labiodental, labiovelar, labored, laborious, laboriously, lapideous, lasting, lateral, lax, leatherlike, leathery, light, lingual, liquid, lithoid, lithoidal, lost to shame, low, lusty, magisterial, manfully, marble, marblelike, massive, matter-of-fact, mean, merciless, methodical, mid, mightily, mighty, miserable, monophthongal, most, much, muscle-bound, muted, narrow, nasal, nasalized, near, near at hand, nearabout, nearabouts, nearby, nervy, never idle, nigh, nigh about, no picnic, nonporous, not easy, not far, obdurate, obfuscated, obscure, obscured, obstinate, occlusive, onerous, only a step, open, operose, operosely, opposed, opposing, opposite, oppressive, orthodox, osseous, overtechnical, oxytone, pachydermatous, packed, painful, painfully, palatal, palatalized, paroxysmal, penetrating, penniless, perplexed, perplexing, perseveringly, persistent, persistently, petrified, pharyngeal, pharyngealized, phonemic, phonetic, phonic, physiologically addictive, piercing, pitch, pitched, pitiless, plain, poignant, poor, positive, posttonic, potent, poverty-stricken, powerful, practical, practically, pragmatic, procrustean, profound, proof against, psychologically addictive, puissant, pungent, purist, puristic, puritan, puritanic, puzzling, racking, real, realistic, red-blooded, relentless, relentlessly, remorseless, resistant, resistive, retroflex, rigid, rigorist, rigoristic, rigorous, robust, robustious, rock-ribbed, rockbound, rocklike, rocky, ropy, rough, rounded, rugged, ruthless, savage, scabrous, scrambled, searching, seared, sedulous, sedulously, semivowel, serious, serried, set, set with thorns, severe, severely, shameless, sharp, shooting, sinewy, sinister, slavish, sleepless, sober, soft, solid, solidified, sonant, sound, sour, spasmatic, spasmic, spasmodic, spiny, spiritedly, spirituous, stabbing, stable, stalwart, stark, steadfastly, steady, steeled against, steellike, steely, steep, stern, sticky, stiff, stinging, stonelike, stony, stonyhearted, stopped, stout, straight, straightforward, straightlaced, straining, straitlaced, strapping, strenuous, strenuously, stressed, stressful, strict, stringent, stringy, strong, strong as brandy, strong as strong, strong-willed, stubborn, studiously, sturdy, substantial, surd, sure-enough, syllabic, systematic, tangled, tart, tenacious, tense, terrible, the hard way, thereabout, thereabouts, thick, thick-growing, thick-skinned, thickset, thorny, throaty, ticklish, tireless, tiring, toilsome, toilsomely, tonal, tonic, tooth and nail, tormenting, torturous, tough, tough as leather, tricky, troublesome, troublous, trying, twangy, tyrannical, unabject, unaccented, unaffected, unalterable, unavoidable, unbending, unblushing, unchangeable, uncompassionate, uncompassioned, uncompromising, uncontrite, undeniable, unemotional, unfalteringly, unfavorable, unfeeling, unflagging, unforgiving, unfriendly, ungentle, ungiving, unidealistic, unkind, unmelted, unmerciful, unmoved, unnatural, unpitiful, unpitying, unpleasant, unquestionable, unrelenting, unremitting, unremorseful, unrepentant, unrepenting, unresponsive, unrounded, unsentimental, unsleeping, unsoftened, unsolvable, unsparing, unstressed, unsympathetic, unsympathizing, untiring, untiringly, untouched, untoward, unvarnished, unwearied, unyielding, uphill, urgently, vehement, velar, verifiable, vigorous, vigorously, vinous, violently, viscid, viscose, viscous, vocalic, vocoid, voiced, voiceless, vowel, vowellike, weak, wearing, wearisome, wearying, well-built, well-constructed, well-defined, well-founded, well-grounded, well-made, well-nigh, wicked, wide, winy, wiry, with a kick, with a will, with effort, within call, within earshot, within hearing, within reach, without mercy, wretched, zealous, zealously