Definition for Sinister:

• Left: on the left hand: evil: unfair: dishonest: unlucky: inauspicious.

Synonyms for Sinister:

• adj.

  •all (adjective)
  • dark,
  • black.
  •black (adjective)
  • sombre,
  • gloomy.
  •dark (adjective)
  • infamous,
  • unpropitious,
  • somber,
  • morose,
  • drab.
  •dishonest (adjective)
  • perfidious.
  •evil (adjective)
  • destructive,
  • mischievous,
  • satanic,
  • heinous,
  • revolting,
  • sinful,
  • reprehensible,
  • nefarious,
  • devilish,
  • foul,
  • wicked,
  • deleterious,
  • injurious,
  • detrimental,
  • calamitous,
  • disgraceful,
  • harmful,
  • unpropitious,
  • terrible,
  • foreboding,
  • unlucky,
  • baneful,
  • atrocious,
  • damnable,
  • unfortunate,
  • dire,
  • pernicious,
  • hideous,
  • malign,
  • loathsome,
  • dishonest,
  • unfavorable,
  • repugnant,
  • poisonous,
  • abominable,
  • monstrous,
  • repulsive,
  • diabolical,
  • repellent,
  • Fiendish,
  • adverse,
  • offensive,
  • evil,
  • bad,
  • woeful.
  •fearful (adjective)
  • horrendous.
  •harmful (adjective)
  • mischievous,
  • pernicious,
  • malefic.
  •hateful (adjective)
  • malevolent.
  •hopeless (adjective)
  • hopeless,
  • black,
  • irremediable.
  •improper (adjective)
  • undue.
  •left (adjective)
  • sinistral,
  • larboard.
  •malevolent (adjective)
  • churlish,
  • wicked,
  • hateful,
  • nasty,
  • evil,
  • malevolent,
  • baleful,
  • spiteful,
  • antagonistic,
  • malicious,
  • vindictive,
  • rancorous,
  • venomous,
  • corrosive,
  • perfidious,
  • hostile,
  • Black-hearted,
  • ill-natured,
  • malignant,
  • baneful,
  • sullen,
  • virulent,
  • vicious,
  • catty,
  • treacherous,
  • mean,
  • hurtful,
  • foul,
  • bitter.
  •nasty, menacing (adjective)
  • portentous,
  • injurious,
  • dire,
  • ominous,
  • evil,
  • poisonous,
  • obnoxious,
  • dishonest,
  • malefic,
  • mischievous,
  • baneful,
  • perverse,
  • woeful,
  • hurtful,
  • inauspicious,
  • lowering,
  • unfortunate,
  • Doomful,
  • malign,
  • apocalyptic,
  • disquieting,
  • baleful,
  • disastrous,
  • malignant,
  • foreboding,
  • deleterious,
  • blackhearted,
  • malevolent,
  • threatening,
  • corrupt,
  • unfavorable,
  • pernicious,
  • harmful,
  • unlucky,
  • bad,
  • adverse,
  • Ill-boding,
  • unpropitious.
  •skeptical (adjective)
  • squint-eyed.
  •threatening (adjective)
  • premonitory,
  • minatory,
  • minacious,
  • comminatory.
  •wicked (adjective)
  • criminal,
  • wicked,
  • debauched,
  • iniquitous,
  • reprehensible,
  • felonious,
  • black,
  • sadistic,
  • base,
  • immoral,
  • Misdoing,
  • perverse,
  • villainous,
  • debased,
  • obnoxious,
  • degenerate,
  • bad,
  • evildoing,
  • improper,
  • damnable,
  • scandalous,
  • lawbreaking,
  • wrongdoing,
  • corrupt,
  • shocking,
  • indecent,
  • depraved,
  • sinful,
  • blameworthy.

• n.

  •
  • warn,
  • malign.
  •sinister (noun)
  • black,
  • alarming,
  • forbidding,
  • ugly,
  • baleful,
  • evil,
  • menacing,
  • minatory,
  • threatening,
  • sinistral,
  • dark,
  • minacious,
  • wicked,
  • ominous.

• Other synonyms:

  •
  • dishonest,
  • left,
  • sneaking.
  •
  • opposing,
  • malign.
  •diabolical
  • diabolic.
  •discouraging
  • hopeless.
  •disquieting
  • disturbing.
  •injurious
  • harmful.
  •malicious
  • satanic.
  •ominous
  • portentous,
  • ominous.
  •Other relevant words:
  • danger,
  • satanic,
  • miscreant,
  • phantom,
  • badness,
  • glowering,
  • cabal,
  • backhanded,
  • dishonorable,
  • sombre,
  • almost,
  • ominous,
  • horrible,
  • circuitous,
  • preternatural,
  • awkward,
  • heavy,
  • impious,
  • shadowlike,
  • deleterious,
  • diabolical,
  • conscienceless,
  • fearful,
  • spectral,
  • harrowing,
  • terrific,
  • malign,
  • unworthy,
  • badly,
  • disturbing,
  • knavish,
  • dispiriting,
  • deep,
  • disastrous,
  • bleak,
  • blackhearted,
  • demon,
  • cancerous,
  • unfavourable,
  • harmful,
  • left-hand,
  • trying,
  • adverse,
  • illegitimacy,
  • reprobate,
  • gloomy,
  • amoral,
  • corruption,
  • dirty work,
  • revolt,
  • weak point,
  • damage,
  • virtually,
  • achromatic,
  • gap,
  • dubious,
  • dirty,
  • excursive,
  • severely,
  • Fiendish,
  • iniquity,
  • accursed,
  • unpromising,
  • eerie,
  • unreal,
  • oblique,
  • ill-starred,
  • in opposition,
  • gross,
  • violently,
  • benighted,
  • gloomily,
  • sidelong,
  • Looming,
  • dark-skinned,
  • naughty,
  • drawback,
  • midnight,
  • grim,
  • hardly,
  • crying shame,
  • portentous,
  • opposing,
  • malefic,
  • flagrant,
  • inimical,
  • ill-fated,
  • foreboding,
  • malignancy,
  • cacodemonic,
  • damned,
  • infernal,
  • tightly,
  • sneaking,
  • hooligan,
  • miserable,
  • unscrupulous,
  • grave,
  • blue,
  • difficult,
  • wraithlike,
  • fraudulent,
  • crazy,
  • ghost-like,
  • ghost,
  • evasive,
  • cruel,
  • indirect,
  • mischief,
  • defect,
  • horrifying,
  • boding,
  • unhealthy,
  • left-handed,
  • flagitious,
  • shady,
  • deadly,
  • shameful,
  • wretched,
  • flaw,
  • non-white,
  • sinistrocerebral,
  • mordant,
  • smutty,
  • larboard,
  • imminent,
  • squint-eyed,
  • deviant,
  • unconscientious,
  • frightening,
  • digressive,
  • clouded,
  • hard,
  • devious,
  • sorry,
  • dishonourable,
  • scurvy,
  • fatal,
  • Ill-boding,
  • closed,
  • alarming,
  • ill-gotten,
  • undue,
  • apparition,
  • shifty,
  • sin,
  • uncanny,
  • intrigue,
  • nigh,
  • peccant,
  • mischievous,
  • creepy,
  • depressing,
  • sour,
  • pitch black,
  • horrid,
  • smuggled,
  • informality,
  • inauspicious,
  • doomed,
  • dour,
  • rebellion,
  • illegality,
  • slippery,
  • narrowly,
  • sedition,
  • counteractive,
  • counterclockwise,
  • morose,
  • intimately,
  • blackened,
  • unkind,
  • demonic,
  • rotten,
  • warn,
  • corrupted,
  • injury,
  • spooky,
  • unethical,
  • Bodeful,
  • stain,
  • unfavorable,
  • conflicting,
  • impending,
  • Doomful,
  • invalid,
  • bootleg,
  • insidious,
  • sinistrality,
  • unnatural,
  • contrary,
  • nearside,
  • bad luck,
  • thickly,
  • unpropitious,
  • left,
  • underhanded,
  • unlawfulness,
  • break,
  • wrong,
  • sinistral,
  • closely,
  • Sinistrous,
  • dingy,
  • doubtful,
  • drab,
  • side,
  • sneaky,
  • godless,
  • phantasmal,
  • inferior,
  • appalling,
  • weakness,
  • harm,
  • diabolic,
  • somber,
  • apocalyptic,
  • lurid,
  • troublesome,
  • contraband,
  • sinistrorse,
  • suspicious,
  • evilness,
  • dire,
  • impish,
  • crooked,
  • cloudy,
  • maleficent,
  • momentous,
  • Unhospitable,
  • underhand,
  • hopeless,
  • ill-omened,
  • dismal,
  • ghastly,
  • Portending,
  • not easy,
  • grotesque,
  • not kosher,
  • troublous,
  • dreary,
  • unevenly,
  • nearly,
  • unfortunate,
  • unskillful,
  • Star-crossed,
  • surly,
  • disquieting,
  • weird,
  • frightful,
  • upsetting,
  • Leftward,
  • strictly,
  • untoward,
  • saturnine,
  • harshly,
  • conspiracy,
  • pitch-dark,
  • forbidding,
  • doomy,
  • contemptible,
  • despicable,
  • Facinorous,
  • inglorious,
  • wickedness,
  • menacing,
  • devilish,
  • bringing ruin,
  • unwholesome,
  • direful,
  • roughly,
  • rudely,
  • unconscionable,
  • perverted,
  • of evil portent,
  • tricky,
  • bully,
  • ghoulish,
  • woeful,
  • opposed,
  • rigorous,
  • unlucky,
  • supernatural,
  • devil,
  • louring,
  • specter,
  • coloured,
  • bend sinister,
  • ungodly,
  • liberal,
  • depravity,
  • ghostly,
  • gruesome,
  • inclemency,
  • minacious,
  • darkly,
  • near,
  • infamous,
  • questionable,
  • minatory,
  • champain,
  • intimidating,
  • dim,
  • horrendous,
  • horrific,
  • twist,
  • blemish,
  • drear,
  • black market,
  • hellish,
  • deviative,
  • opposite,
  • backhand,
  • unholy,
  • inaccurate,
  • demoniac,
  • coarsely,
  • downbeat,
  • plot,
  • scowling,
  • confederacy,
  • Fiendly,
  • divergent,
  • execrable,
  • sinistrocular,
  • ill,
  • fateful,
  • jackleg,
  • port,
  • dirty trick,
  • colored,
  • unprincipled,
  • injurious,
  • furtive,
  • glum,
  • unpleasant,
  • prankish,
  • fell,
  • exactly,
  • counter,
  • ignominious,
  • unearthly,
  • inhuman,
  • ruffian,
  • terrifying,
  • fraught with danger,
  • obscure,
  • attainder,
  • inexpedient,
  • odious,
  • fishy,
  • taint,
  • disconsolate,
  • sinistrorsal,
  • vile,
  • deathly,
  • left-wing,
  • scary,
  • pernicious,
  • levorotatory,
  • half blood,
  • ugly,
  • premonitory,
  • injustice,
  • threatening,
  • incarnate,
  • comminatory,
  • gauche,
  • badge of infamy,
  • poisonous,
  • macabre,
  • dark,
  • unsavory,
  • irremediable,
  • murkily,
  • stressful,
  • madcap,
  • shameless,
  • rascal,
  • opprobrious,
  • traitorous,
  • mephistophelian,
  • radical,
  • lowering,
  • shortcoming,
  • approximately,
  • dread,
  • fault,
  • Scandalum magnatum,
  • bitchy,
  • strange,
  • awful,
  • dimly,
  • Ill-got,
  • moody,
  • dreadful,
  • dishonest,
  • secret.

Antonyms for Sinister:

• adj.

  • nasty, menacing
    auspicious, lucky, happy, kind, benevolent, nice, good.
  • Other antonyms:
    favorable, unthreatening, unalarming, prosperous, dextral.

• Other antonyms:

  • n. t.
    benevolent, calming, happy, heroic, honourable, innocent, just, noble, prosperous, reassuring, righteous, upright, worthy.