Dangerous synonyms

hazardous

Risky; dangerous; perilous

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unsafe

Not safe; dangerous.

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treacherous

Characterized by unforeseen or hidden hazards; dangerous or deceptive:

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risky

Involving risk; hazardous; dangerous

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perilous

Full of or involving peril; dangerous or risky.

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out-of-the-frying-pan-and-into-the-fire

Involving an active threat

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insecure

The definition of insecure is having a lack of confidence, or exposed to danger or risk.

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rocky

(Figuratively) Not easily impressed or affected; hard; unfeeling; obdurate; as, a rocky bosom.

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jeopardous

Marked by jeopardy; dangerous or perilous

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fraught with danger

Not safe

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full of risk

Not safe

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serious

Without humor or expression of happiness; grave in manner or disposition; earnest; thoughtful; solemn.

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nasty

Very dangerous, troublesome, grievous, etc.

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safe (antonym)

Free from danger or injury; undamaged or unhurt:

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critical

Relating to criticism or careful analysis, such as literary or film criticism.

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ominous (related)

Specifically, giving indication of a coming ill; being an evil omen; threatening; portentous; inauspicious.

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mortal

Fatally vulnerable; vital.

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bad

Not suitable or fitting.

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grievous

Causing grief, pain, or anguish:

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formidable

Difficult to undertake, surmount, or defeat:

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secure (antonym)

Free from risk of loss; safe:

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shaky

Not dependable or reliable; questionable

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life-threatening

Used to describe something that endangers the continued life of the subject.

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causing danger

Not safe

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breakneck

Likely to cause an accident:

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uncertain

Subject to change; variable:

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hairy

Of a body part other than the head, having hair growing from it.

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parlous

Dire, terrible, appalling.

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adventurous

(Of a person) Inclined to adventure; willing to incur risks; prone to embark in hazardous enterprise; rashly daring.

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unstable

Unpredictable.

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endangered (related)

In danger, at risk, said of something where there is a strong possibility something bad will happen to it (for example, a species in danger of going extinct)

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deadly

Perfectly accurate

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imminent

Likely to happen without delay; impending; often, specif., threatening, looming, etc.

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unsound

Not safe, firm, or solid; insecure

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help (related)

Causing or marked by danger or pain, for example

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ticklish

Very sensitive or easily upset; touchy

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impregnable

Impossible to capture or enter by force:

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speculative

The definition of speculative is based off of thoughts not evidence.

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unhazardous (antonym)

Not hazardous.

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careful (antonym)

The definition of careful is someone or something that works or thinks in a cautious, thorough or thoughtful way.

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venturesome

Bold; willing to take risks; adventurous.

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venturous

Venturesome.

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grave

The definition of grave is something that is serious or taken seriously or doing something in a solemn or sedate manner.

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vulnerable

Easily hurt, as by adverse criticism; sensitive

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exposed

Not safe

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involving risk

Not safe

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alarming

Causing apprehension, fear or alarm; frightening

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delicate

Intended for use with fragile items.

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thorny

Having many thorns or abounding in thorn-covered vegetation:

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menacing

The definition of menacing is someone or something that is threatening or that suggests danger.

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threatening

Gving warning signs of bad weather:

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malignant

The definition of malignant is something evil or intending harm, a tumor that is spreading, or a disease that is invasive.

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armed

Having arms (limbs) of a specified kind

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explosive

(Slang) Easily driven to anger, usually with reference to a person.

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on a collision course

Involving an active threat

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chancy

(Scot.) Bringing good luck

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touchy

Very risky

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severe

Serious or grievous

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precarious

Dependent upon mere assumption; unwarranted

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unprotected

Not protected; open to assault, injury, damage, or theft.

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unshielded

Not shielded.

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unsheltered

Without shelter; exposed.

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portentous

Ponderous or pompous; self-important

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fatal

The definition of fatal is something that causes death or that leads to failure or disaster.

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safety (related)

Giving safety; reducing danger or harm

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guarded (antonym)

Kept from escape or trouble; held in check; supervised

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untroubled (antonym)

Not disturbed or distracted.

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lethal (related)

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damaging (related)

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cruel (related)

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toxic (related)

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irresponsible (related)

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slippery

Not trustworthy; elusive or tricky:

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unsteady

Changeable; inconstant; wavering

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rickety

Liable to collapse or break down because weak or unsteady

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unhealthy

Sick or ill

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dicey

Of uncertain, risky outcome.

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impending

Approaching; drawing near; about to happen

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ugly

Repulsive or offensive; objectionable:

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terrible

Extremely formidable:

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touch-and-go

Uncertain, risky, or precarious

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sure (antonym)

Having or showing no doubt; positive; confident

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helpful (antonym)

Providing assistance; useful.

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innocent (antonym)

Not guilty of a specific crime or offense; legally blameless:

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beneficial (antonym)

(Law) For one's own benefit

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hot

(Slang) Very good or impressive. Often used in the negative:

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frightening (related)

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destructive (related)

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troublesome (related)

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harmful (related)

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poisonous (related)

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unpleasant (related)

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Dangerous synonyms

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Dangerous Sentence Examples

Words that mention dangerous in the Dictionary

Words near dangerous in the Thesaurus