Definition for Treacherous:

• Full of treachery: faithless.

Synonyms for Treacherous:

• adj.

  •all (adjective)
  • unreliable.
  •bad (adjective)
  • nefarious.
  •cowardly (adjective)
  • recreant,
  • yellow.
  •crooked (adjective)
  • untruthful.
  •dangerous (adjective)
  • threatening,
  • menacing,
  • insecure,
  • risky,
  • ticklish,
  • precarious,
  • unsafe,
  • alarming,
  • parlous,
  • hairy,
  • icy,
  • unsound,
  • difficult,
  • ominous,
  • wicked,
  • faulty,
  • shaky,
  • dangerous,
  • unhealthy,
  • perilous,
  • Dissembled,
  • hazardous,
  • Jeopardous,
  • unstable,
  • ugly,
  • chancy.
  •deceptive (adjective)
  • insidious.
  •difficult (adjective)
  • scabrous.
  •dishonest (adjective)
  • insincere,
  • dishonorable,
  • dishonest,
  • deceptive,
  • fraudulent,
  • felonious,
  • untrue,
  • crooked,
  • untrustworthy,
  • unscrupulous,
  • crafty,
  • devious,
  • Prevaricating,
  • immoral,
  • cheating,
  • Deceiving,
  • lying,
  • hypocritical,
  • underhanded,
  • deceitful,
  • traitorous,
  • corrupt,
  • turncoat,
  • double-faced.
  •dishonest, disloyal (adjective)
  • recreant,
  • two-timing,
  • False-hearted,
  • unfaithful,
  • treasonable,
  • faithless,
  • slick,
  • undependable,
  • catchy,
  • misleading,
  • fly-by-night,
  • unloyal,
  • deceptive,
  • deceitful,
  • false,
  • untrustworthy,
  • tricky,
  • duplicitous,
  • two-faced,
  • insidious,
  • betraying,
  • unreliable,
  • slippery,
  • perfidious,
  • snake in the grass,
  • shifty,
  • untrue,
  • double-crossing,
  • traitorous.
  •disobedient (adjective)
  • traitorous,
  • mutinous,
  • mischievous,
  • seditious,
  • treasonous,
  • recalcitrant,
  • unmanageable,
  • anarchistic,
  • out of control,
  • factious,
  • intractable,
  • unruly,
  • disloyal,
  • nonconformist,
  • Disobeying,
  • disobedient,
  • subversive,
  • defiant,
  • ungovernable,
  • rebellious,
  • Disregardful,
  • insubordinate,
  • Misbehaving,
  • wayward,
  • undisciplined,
  • contrary.
  •false (adjective)
  • Forsworn,
  • Perjured.
  •lying under oath (adjective)
  • Perjurious.
  •malevolent (adjective)
  • ill-natured,
  • spiteful,
  • wicked,
  • venomous,
  • perfidious,
  • corrosive,
  • malicious,
  • sullen,
  • baleful,
  • hostile,
  • foul,
  • Black-hearted,
  • bitter,
  • baneful,
  • evil,
  • virulent,
  • rancorous,
  • churlish,
  • sinister,
  • hateful,
  • antagonistic,
  • vicious,
  • malignant,
  • hurtful,
  • mean,
  • malevolent,
  • vindictive,
  • catty,
  • nasty.
  •underhand (adjective)
  • lubricious.
  •unreliable (adjective)
  • reliable,
  • faulty,
  • unstable,
  • Trustless,
  • misleading,
  • tricky,
  • dependable,
  • ticklish,
  • slippery,
  • alarming,
  • shaky,
  • deceptive,
  • difficult.
  •wicked (adjective)
  • wicked.

• n.

  •
  • harmful,
  • ruinous,
  • disastrous,
  • injurious,
  • damaging.
  •
  • false.
  •
  • trust,
  • faithless,
  • recreant,
  • untrue,
  • False-hearted,
  • continue.
  •
  • parlous,
  • venturous,
  • adventurous,
  • safety,
  • venturesome,
  • chancy,
  • hairy.
  •disloyal (noun)
  • disaffected.
  •traitorous (noun)
  • false,
  • faithless,
  • treasonable.
  •treacherous (noun)
  • unfaithful,
  • perfidious,
  • punic,
  • unreliable,
  • unsafe,
  • dangerous.

• Other synonyms:

  •Punic
  • punic.
  •
  • false,
  • faithless,
  • False-hearted.
  •
  • parlous,
  • chancy,
  • venturous,
  • incendiary.
  •
  • lying,
  • adventurous,
  • venturesome,
  • hairy.
  •
  • untrue.
  •crafty
  • sly.
  •deceitful
  • two-faced.
  •disloyal
  • disaffected,
  • renegade.
  •injurious
  • harmful.
  •sneaky
  • snaky.
  •unsteady
  • unbalanced.
  •wobbly
  • unsteady.
  •Other relevant words:
  • provocative,
  • abominable,
  • Mean-spirited,
  • awful,
  • fishy,
  • riotous,
  • deadly,
  • villainous,
  • continue,
  • recreant,
  • dubious,
  • misleading,
  • venturous,
  • black,
  • passionate,
  • depraved,
  • shifty,
  • paltry,
  • clever,
  • alarming,
  • uneven,
  • lubricious,
  • unjust,
  • brazen,
  • fervent,
  • iniquitous,
  • sly,
  • indirect,
  • complete,
  • monstrous,
  • audacious,
  • rabble-rousing,
  • artificial,
  • traitor,
  • outrageous,
  • fiery,
  • reprobate,
  • arrant,
  • slippery,
  • disastrous,
  • faulty,
  • snake in the grass,
  • wretched,
  • degenerate,
  • double-crossing,
  • barefaced,
  • fly,
  • dastardly,
  • catchy,
  • adulterous,
  • venturesome,
  • short memory,
  • desultory,
  • ticklish,
  • cruel,
  • sinful,
  • in the balance,
  • unsure,
  • provisional,
  • flimsy,
  • diabolical,
  • rousing,
  • unsportsmanlike,
  • meretricious,
  • delusive,
  • untruthful,
  • fallacious,
  • unpredictable,
  • insurgent,
  • rabid,
  • unprincipled,
  • vile,
  • delusory,
  • dodgy,
  • impure,
  • tremulous,
  • Truthless,
  • fickle,
  • illusive,
  • dark,
  • furtive,
  • lying,
  • faithless,
  • scornful,
  • shaky,
  • yellow,
  • hairy,
  • reptilian,
  • flagrant,
  • sensitive,
  • damaging,
  • conscienceless,
  • unethical,
  • glaring,
  • trust,
  • sunken,
  • oily,
  • infamous,
  • roguish,
  • timeserving,
  • reprehensible,
  • treasonable,
  • atrocious,
  • purchasable,
  • incendiary,
  • shifting,
  • Plotting,
  • undependable,
  • scabrous,
  • heinous,
  • Covinous,
  • explosive,
  • dissembling,
  • frenzied,
  • filthy,
  • canny,
  • conniving,
  • infirm,
  • slimy,
  • shocking,
  • fake,
  • amoral,
  • venal,
  • wily,
  • surreptitious,
  • bent,
  • injurious,
  • vulpine,
  • shrewd,
  • egregious,
  • feigning,
  • notorious,
  • questionable,
  • two-faced,
  • precariousness,
  • delicate,
  • lawless,
  • unpatriotic,
  • Subversionary,
  • unctuous,
  • contemptible,
  • tottery,
  • evasive,
  • secretive,
  • one-sided,
  • punic,
  • dissolute,
  • Conspiring,
  • harmful,
  • dishonourable,
  • conspicuous,
  • janus-faced,
  • refractory,
  • Subreptitious,
  • cagey,
  • disaffected,
  • Perjurious,
  • ruinous,
  • made-up,
  • shameful,
  • insurrectionary,
  • scandalous,
  • unsettled,
  • untrue,
  • lapse of memory,
  • difficult,
  • Seditionary,
  • pawky,
  • tentative,
  • unconscionable,
  • renegade,
  • revolutionary,
  • stealthy,
  • wrong,
  • dissident,
  • double-tongued,
  • unspeakable,
  • falsehearted,
  • designing,
  • Perjured,
  • bold,
  • obvious,
  • ENG,
  • sharp,
  • unhealthy,
  • unstable,
  • unsubstantial,
  • underhand,
  • infernal,
  • unfaithful,
  • false,
  • machiavellian,
  • temporary,
  • rank,
  • unsteady,
  • Forsworn,
  • Unsolid,
  • unregenerate,
  • irresponsible,
  • heretical,
  • inflaming,
  • unbalanced,
  • Chiseling,
  • fly-by-night,
  • rotten,
  • sneaky,
  • knavish,
  • diabolic,
  • deceptive,
  • disingenuous,
  • chancy,
  • disreputable,
  • apostate,
  • double-minded,
  • fervid,
  • bad,
  • blackguardly,
  • problematic,
  • pernicious,
  • dependable,
  • hollow,
  • ambidextrous,
  • unsound,
  • tricky,
  • icy,
  • shady,
  • insidious,
  • mendacious,
  • weak,
  • collusive,
  • parlous,
  • ungenuine,
  • disgraceful,
  • abandoned,
  • cunning,
  • Unsteadfast,
  • dissimulating,
  • False-hearted,
  • demagogic,
  • Doublehearted,
  • low,
  • scurvy,
  • unfair,
  • unloyal,
  • slick,
  • contemptuous,
  • blatant,
  • snaky,
  • Trustless,
  • ugly,
  • tortuous,
  • unreliable,
  • carthaginian,
  • despicable,
  • gross,
  • pharisaic,
  • fibbing,
  • frantic,
  • adventurous,
  • guileful,
  • dirty,
  • intriguing,
  • Fomenting,
  • out-and-out,
  • double,
  • inconstant,
  • hellish,
  • Dissembled,
  • criminal,
  • thieving,
  • artful,
  • discreditable,
  • safety,
  • pretending,
  • shameless,
  • base,
  • inconsiderate,
  • duplicitous,
  • foxy,
  • thievish,
  • malign,
  • uncertain,
  • no,
  • utter,
  • capricious,
  • calculating,
  • iffy,
  • open,
  • detestable,
  • unsporting,
  • Time-serving,
  • dicey,
  • scheming,
  • murderous,
  • Trickish,
  • Concocted,
  • inflammatory,
  • fabricated,
  • sanctimonious,
  • insurrectionist,
  • counterfeit,
  • rocky,
  • flagitious,
  • two-timing,
  • smooth,
  • Double dealing,
  • faking,
  • touch-and-go,
  • Double-hearted,
  • nefarious,
  • insubstantial,
  • doubtful,
  • betraying,
  • finagling,
  • conspiratorial.

Antonyms for Treacherous:

• adj.

  • dangerous
    secure, uncomplicated, friendly, definite, sure, stable, safe, straightforward, strong, protected, certain, easy.
  • dishonest, disloyal
    loyal, untreacherous, forthright, reliable, true, harmless, honest.
  • Other antonyms:
    reliable, dutiful, ardent, dyed-in-the-wool, fast, determined, safe, loyal, tried and true, faithful, unhesitating, unwavering, dependable, responsible, unfaltering, trustworthy, fervid, true, down-the-line, sworn, staunch, resolute, passionate, constant, trustable, avid, steadfast, trusty, devoted, tried, enthusiastic, devout, dedicated, fervent, impassioned, inveterate, confirmed, solid, steady, intent.

• Other antonyms:

  • n. t.
    ardent, avid, certain, confirmed, constant, dedicated, definite, dependable, determined, devoted, devout, dutiful, dyed-in-the-wool, easy, enthusiastic, faithful, fast, fervent, fervid, forthright, friendly, harmless, honest, impassioned, intent, inveterate, loyal, passionate, protected, reliable, resolute, responsible, safe, secure, solid, stable, staunch, steadfast, steady, straightforward, strong, sure, sworn, tried, true, trustworthy, trusty, uncomplicated, unfaltering, unhesitating, unwavering, trustable, down-the-line, untreacherous, tried-and-true.