Hard

Synonyms Firm, dense, stiff, unbreakable, unpliable, unyielding, hardened, compacted, tough, stony, flinty, compressed, as hard as stone, adamantine, renitent, solid, rigid, resistant, inflexible, impenetrable, solidified, compact, steely, strong, rocklike, close-packed, as hard as iron, frozen, and unmalleable.

Synonyms Forceful, strong, smart, powerful, mighty, tremendous, heavy, sharp, violent, vigorous, and hefty.

Synonyms Arduous, tiring, exhausting, back-breaking, heavy, difficult, exacting, challenging, punishing, formidable, rigorous, Herculean, killing, knackering, exigent, perplexing, bewildering, knotty, ticklish, enigmatic, complex, involved, insoluble, impenetrable, unanswerable, mind-bending, insolvable, strenuous, fatiguing, wearying, gruelling, laborious, taxing, testing, demanding, tough, onerous, uphill, murderous, hellish, toilsome, puzzling, baffling, mystifying, thorny, problematic, complicated, intricate, tangled, unfathomable, incomprehensible, spiny, gnarly, and wildering.

Synonyms Diligent, industrious, assiduous, energetic, enthusiastic, earnest, persistent, untiring, studious, hard-working, sedulous, conscientious, keen, zealous, persevering, unflagging, and indefatigable.

Synonyms Harsh, difficult, bleak, tough, unpleasant, uncomfortable, unendurable, insupportable, spartan, severe, painful, grim, bad, dire, austere, disagreeable, intolerable, unbearable, straitened, dark, distressing, and awful.

Synonyms Strict, firm, stern, rigorous, exacting, unfriendly, cold, hard-hearted, unfeeling, unbending, inflexible, implacable, obdurate, unrelenting, lacking compassion, ruthless, oppressive, pitiless, cruel, unjust, standing no nonsense, hard-boiled, solid, harsh, severe, tough, demanding, unkind, unsympathetic, heartless, cold-hearted, intransigent, uncompromising, intolerant, stubborn, unyielding, unsparing, grim, merciless, tyrannical, callous, vicious, unfair, ruling with a rod of iron, and badass.

Synonyms Bitterly cold, bitter, severe, bleak, icy, arctic, Siberian, Baltic, cold, harsh, extreme, freezing, icy-cold, polar, and glacial.

Synonyms Reliable, true, confirmed, indisputable, verifiable, cold, bold, unvarnished, definite, actual, undeniable, unquestionable, plain, bare, harsh, and unembellished.

Synonyms Alcoholic, intoxicating, stiff, spirituous, intoxicant, strong, inebriating, potent, and vinous.

Synonyms Addictive, causing dependency, harmful, habit-forming, strong, and narcotic.

Synonyms Diligently, assiduously, sedulously, intensely, energetically, persistently, steadily, untiringly, with application, like mad, like billy-o, with effort, painfully, laboriously, industriously, conscientiously, busily, enthusiastically, earnestly, doggedly, indefatigably, all out, with perseverance, like crazy, with difficulty, after a struggle, and arduously.

Synonyms Forcefully, fiercely, powerfully, strenuously, sharply, intensely, with all one's might, with vigour, with great effort, badly, acutely, keenly, profoundly, grievously, in torrents, cats and dogs, buckets, stair rods, forcibly, roughly, strongly, heavily, vigorously, energetically, with might and main, with force, severely, harshly, deeply, seriously, violently, gravely, in sheets, steadily, bucketloads, and pitchforks.