List of grim synonyms and grim related words.
Spartan, Spartanic, adamant, adamantine, affording no hope, alarming, anguished, anxious, apathetic, appalling, astounding, astringent, atrocious, austere, authoritarian, awe-inspiring, awesome, awful, baneful, barbarous, barfy, beastly, beetle-browed, black, black-browed, bleak, bloodthirsty, bored, brutal, brutish, bum, cast-iron, certain, cheerless, cheesy, cold, comfortless, crappy, creepy, cruel, crummy, dark, dead set, decided, decorous, dejected, demanding, demure, depressed, despairing, desperate, despondent, determined, dire, direful, dirty, disconsolate, discontented, disgusted, dismal, dogged, dour, dread, dreaded, dreadful, drear, drearisome, dreary, dumpish, earnest, eerie, evil, evil-favored, evil-looking, exacting, exigent, fell, feral, ferocious, fiendish, fierce, firm, fixed, flagitious, flinty, forbidding, foreboding, forlorn, formal, formidable, frightening, frightful, frowning, funebrial, funereal, ghastly, ghoulish, gloomy, glowering, glum, godawful, goshawful, grave, gray, grim-faced, grim-visaged, grisly, grotesque, gruesome, grum, hairy, hard, hard-core, hard-favored, hard-featured, hard-visaged, harrowing, harsh, headstrong, heartless, heinous, hideous, homicidal, hopeless, horrendous, horrible, horrid, horrific, horrifying, humorless, icky, ill-favored, ill-featured, ill-looking, immovable, immutable, implacable, impliable, in bad humor, in despair, inclement, inelastic, inevitable, inexorable, infestive, inflexible, inhuman, inhumane, iniquitous, intractable, intransigent, iron, irreconcilable, joyless, loathsome, long-faced, lowering, lurid, macabre, melancholy, merciless, meticulous, mirthless, miserable, monstrous, moodish, moody, mopey, moping, mopish, morbid, morose, mortal, mumpish, murderous, nauseated, nauseous, obdurate, obstinate, offensive, ominous, out of humor, out of sorts, pitiless, pleasureless, prey to malaise, punk, putrid, redoubtable, relentless, repelled, repugnant, repulsive, resolute, revolted, revolting, rigid, rigorous, rock-ribbed, rotten, rough, rugged, ruthless, sad, saturnine, savage, schrecklich, scowling, sedate, serious, set, severe, shitty, shocking, sickened, sinister, sober, sober-minded, sobersided, solemn, somber, sombrous, sorry, sorryish, staid, steadfast, steely, stern, stiff, stinking, stinky, stone-faced, stony, straight-faced, strict, stringent, stubborn, suffering angst, sulky, sullen, surly, terrible, terrific, terrifying, thoughtful, tough, tragic, tremendous, triste, truculent, unaffected, unalterable, unappeasable, unbending, unchangeable, uncheerful, uncheery, uncompromising, uneasy, unflinching, unforgiving, unfulfilled, ungentle, ungiving, ungratified, unhappy, unhopeful, unjoyful, unmirthful, unmoved, unmoving, unprepossessing, unquiet, unrelenting, unsatisfied, unsmiling, unsparing, unspeakable, unwavering, unyielding, vicious, vindictive, violent, vomity, weariful, wearisome, weary, weighty, wicked, without hope, wolfish, wretched, yecchy