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HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
THESAURUS
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WORDNET DICTIONARY

Adjective baleful has 2 senses

• baleful(s = adj.all) baneful - deadly or sinister; "the Florida eagles have a fierce baleful look"
Derived form noun balefulness₁

• baleful(s = adj.all) forbidding, menacing, minacious, minatory, ominous, sinister, threatening - threatening or foreshadowing evil or tragic developments; "a baleful look"; "forbidding thunderclouds"; "his tone became menacing"; "ominous rumblings of discontent"; "sinister storm clouds"; "a sinister smile"; "his threatening behavior"; "ugly black clouds"; "the situation became ugly"
Derived form noun balefulness₁

CIDE DICTIONARY

OXFORD DICTIONARY

THESAURUS

baleful

apocalyptic, bad, baneful, bitchy, black, bodeful, boding, corroding, corrosive, corrupting, corruptive, counterproductive, cussed, damaging, dark, deadly, deleterious, detrimental, dire, direful, disadvantageous, disserviceable, distressing, doomful, dreary, evil, evil-starred, fateful, foreboding, gloomy, harmful, hateful, hurtful, ill, ill-boding, ill-fated, ill-omened, ill-starred, inauspicious, iniquitous, injurious, invidious, lethal, lowering, malefic, maleficent, malevolent, malicious, malign, malignant, mean, menacing, mischievous, nasty, noisome, noxious, of evil portent, ominous, ornery, pernicious, poisonous, portending, portentous, prejudicial, scatheful, sinister, somber, threatening, toxic, unfavorable, unfortunate, unlucky, unpromising, unpropitious, untoward, venenate, veneniferous, venenous, venomous, vicious, virulent, wicked

ROGET THESAURUS

baleful

Badness

N badness, hurtfulness, virulence, evil doer, bane, plague spot, evil star, ill wind, hoodoo, Jonah, snake in the grass, skeleton in the closet, amari aliquid, thorn in the side, malignity, malevolence, tender mercies, ill-treatment, annoyance, molestation, abuse, oppression, persecution, outrage, misusage, injury, knockout drops, badness, peccancy, abomination, painfulness, pestilence, guilt, depravity, hurtful, harmful, scathful, baneful, baleful, injurious, deleterious, detrimental, noxious, pernicious, mischievous, full of mischief, mischief-making, malefic, malignant, nocuous, noisome, prejudicial, disserviceable, disadvantageous, wide-wasting, unlucky, sinister, obnoxious, untoward, disastrous, oppressive, burdensome, onerous, malign, corrupting &c (corrupt), virulent, venomous, envenomed, corrosive, poisonous, deadly, destructive, inauspicious, bad, ill, arrant, as bad as bad can be, dreadful, horrid, horrible, dire, rank, peccant, foul, fulsome, rotten, rotten at the core, vile, base, villainous, mean, injured, deteriorated, unsatisfactory, exceptionable indifferent, below par, illcontrived, ill-conditioned, wretched, sad, grievous, deplorable, lamentable, pitiful, pitiable, woeful, evil, wrong, depraved, shocking, reprehensible, hateful, hateful as a toad, abominable, detestable, execrable, cursed, accursed, confounded, damned, damnable, infernal, diabolic, unadvisable, unprofitable, incompetent, irremediable, badly, wrong, ill, to one's cost, where the shoe pinches, bad is the best: the worst come to the worst, herba mala presto cresco, wrongs unredressed or insults unavenged.

For further exploring for "baleful" in Webster Dictionary Online