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Looking for synonyms for "sinister"? Browse alternatives ranked by relevance — sharper word choices for fiction, poetry, and copywriting.
(adj)
Intending to harm; malevolent.
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Evil or mischievous by nature; morally reprehensible.
Displeasing to the eye; aesthetically unpleasing.
Causing apprehension, fear or alarm; frightening.
(now rare) Synonym of threatening, in its various senses.
Presenting a threat, posing a likely risk of harm.
Threatening, menacing.
Synonym of threatening in its various senses.
Appearing to be threatening, unfriendly or potentially unpleasant.
(of an object) Absorbing all light and reflecting none; dark and hueless.
Having an absolute or (more often) relative lack of light.
Of, facing, or on the left side.
Portending evil; ominous.
Specifically, giving indication of a coming ill; being an evil omen
Sinful, villainous, criminal, or wicked, especially when noteworthy or notorious for such characteristics.
Malevolent.
Not holy; (by extension) evil, impure, or otherwise perverted.
Harmful, malevolent, injurious.
Having a bad reputation; disreputable; notorious; unpleasant or evil; widely known, especially for something scornful.
Intending to do harm; characterized by spite and malice.
Morally low; base; despicable.
Bad, evil or villainous.
Requiring action to prevent bad consequences: urgent, pressing.
Extremely or shockingly ugly.
Not honest; shoddy.
Causing much harm in a subtle way.
unlucky; doomed.
Very bad; abominable, disgusting.
Extremely bad; awful; terrible.
Hideous or frightful.
Marked or accompanied by or resulting in misfortune.
Extremely unfavorable; terrible.
Causing despair; gloomy and bleak.
Boring; not exciting or interesting.
Of the nature of a disaster; calamitous.
Violent, destructive and cruel.
Genuinely horrific, awful, or alarming; dangerous, risky.
Causing horror; terrible; shocking.
Causing horror; horrifying.
Repellently frightful and shocking; ghastly, horrific.
Inspiring fear, especially in a mysterious or shadowy way; strange, weird.
Very unpleasant; disagreeable.
Very severe, cruel, or harsh.
Having an unusually strange character or behaviour.
Causing depression or sadness.
Horrifyingly shocking.
Dismal and gloomy, cold and forbidding.
(informal) Eerie, or suggestive of ghosts or the supernatural.
Causing harm in a stealthy, often gradual, manner.
Difficult to understand; abstruse.
Causing mental trouble or anguish; upsetting; making uneasy.
Causing distress or worry; upsetting or unsettling.
Ghastly, shocking, terrifying.
Causing fear; or capable of causing fear; scary.
distressing, worrying
Suffering from gloom; melancholy; dejected.
Feeling sorrow; sorrowful, mournful.
Dark; gloomy; shadowy, dimly lit.
Difficult to understand.
Inducing worry.
Disastrous; ruinous.
Unhappy; cheerless; miserable; emotionally desolate.
(by extension) Dishonest and sneaky; done in a secret or sly manner.
Causing ruin; destructive, calamitous.
Full of danger.
Unreliable; dangerous.
Dangerous, full of peril.
Overspread with shade; sheltered from the glare of light or sultry heat.
In shadow; darkened by shadows.
(informal) Producing an uneasy fearful sensation, as of things crawling over one's skin.
Impossible to speak about.
Beyond what is obvious or evident.
Momentous, significant, setting or sealing one’s fate.
(n)
The soul of a person or other creature.
Causing death or destruction.
Hard to see through, as a fog or mist.
Of a strong and cruel nature; eager and unsparing; grim; fierce; ruthless; savage.
(politics) Of political ideologies: favoring political, social, and economic equality.
Containing sufficient poison to be dangerous to touch or ingest.
Having or displaying ill will; wishing harm on others.
A sense of evil to come.
Having an evil or harmful influence; baleful.
Having a bad omen; inauspicious; unlucky.
Of momentous or ominous significance.
Pertaining to demons or evil spirits; demoniac.
(hyperbolic) causing great pain, discomfort or distress
Morally objectionable; sinful, wicked.
(archaic) On the left side; inclined to the left; sinistral.
Misspelling of insidious. [Causing harm in a stealthy, often gradual, manner.]
(rare) Unfavourable, untimely; perverse.
(v)
Obsolete spelling of malign. [(transitive) To make defamatory statements about; to slander or traduce.]
Of a person or entity: generally or widely known for something negative; infamous.
Obsolete form of malicious. [Intending to do harm; characterized by spite and malice.]
Misspelling of ignominious. [Marked by great disgrace, dishonour, humiliation, or shame; disgraceful, shameful.]
(Caribbean, Jamaica) Suspicious, malicious or cynical.
Unfavourable, adverse, or disadvantageous.
malicious, malevolent
(archaic) unhealthy
Counterfeit or fake; not genuine.