monstrous

1 badly or imperfectly formed a monstrous melon that was clearly not fit to eat Synonyms deformed, distorted, misshapen, malformed, shapelessRelated Words defaced, disfigured; aberrant, abnormal, freakish, mutant; asymmetrical (or asymmetric), crooked, disproportionate, irregular, lopsided, nonsymmetrical, overbalanced, unbalanced, unequal; horrible, horrific, terrible; ugly, unattractiveNear Antonyms shapely; flawless, perfectAntonyms undeformed

2 extremely disturbing or repellent the monstrous measures taken by the dictator against anyone who opposed his regime Synonyms appalling, atrocious, awful, dreadful, frightful, ghastly, grisly, gruesome (also grewsome), hideous, horrendous, horrid, horrific, horrifying, lurid, macabre, horrible, nightmare, nightmarish, shocking, terrible, terrificRelated Words alarming, bloodcurdling, dire, direful, fearful, fearsome, forbidding, formidable, frightening, gut-wrenching, hair-raising, heart-stopping, intimidating, redoubtable, scary, terrifying; abhorrent, deplorable, disagreeable, disgusting, distasteful, loathsome, nauseating, noisome, obnoxious, obscene, offensive, repugnant, repulsive, revolting, sickening; abominable, evil, foul, heinous, noxious, odious, unspeakable, vile; grotesque, ugly, unsightlyNear Antonyms agreeable, appealing, attractive, delectable, delicious, delightful, enjoyable, enticing, inviting, pleasant, pleasing, pleasurable, satisfying, welcome; cheering, comforting, soothing

3 unusually large a monstrous tomato as big as a basketball Synonyms astronomical (also astronomic), Brobdingnagian, bumper, colossal, cosmic (also cosmical), cyclopean, elephantine, enormous, galactic, gargantuan, giant, gigantesque, gigantic, grand, herculean, heroic (also heroical), Himalayan, humongous (also humungous), immense, jumbo, king-size (or king-sized), leviathan, mammoth, massive, mega, mighty, monster, huge, monumental, mountainous, oceanic, pharaonic, planetary, prodigious, super, super-duper, supersize, supersized, titanic, tremendous, vast, vasty, walloping, whacking, whoppingRelated Words big, bulky, considerable, extensive, good, goodly, great, gross, handsome, hefty, hulking, largish, major, outsize (also outsized), overgrown, oversize (or oversized), sizable (or sizeable), substantial, tidy, voluminous; august, formidable, grandiose, imposing, lofty, majestic; cavernous, monolithic, overwhelming, staggering, stupendous, towering; boundless, immeasurable, infiniteNear Antonyms little, mini, petite, pint-size (or pint-sized), puny, small, smallish, undersized (also undersize); dinky, dwarfish, half-pintAntonyms bantam, bitty, diminutive, infinitesimal, Lilliputian, little bitty, micro, microminiature, microscopic (also microscopical), midget, miniature, minuscule, minute, pocket, pygmy, teensy, teensy-weensy, teeny, teeny-weeny, tiny, wee

4 unpleasant to look at some monstrous high-rises have begun to spoil that lovely residential neighborhood Synonyms grotesque, hideous, homely, ill-favored, ugly, unappealing, unattractive, unbeautiful, uncomely, unhandsome, unlovely, unpleasing, unpretty, unsightly, vileRelated Words abhorrent, abominable, appalling, awful, disgusting, distasteful, dreadful, gross, horrible, horrid, loathsome, nauseating, nauseous, noisome, repellent (also repellant), repugnant, repulsive, revolting, sickening; frumpish, frumpy, plain, unaesthetic, unbecoming, unshapelyNear Antonyms shapely; imposing, impressive, prepossessingAntonyms aesthetic (also esthetic or aesthetical or esthetical), attractive, beauteous, beautiful, bonny (also bonnie) [chiefly British], comely, cute, drop-dead, fair, fetching, good-looking, goodly, gorgeous, handsome, knockout, lovely, pretty, ravishing, seemly, sightly, stunning, taking, well-favored