Synonyms of the word

harmful

• adj. of a kind likely to be damaging; injurious.

abusive

• adj. Wrongly used; perverted; misapplied; unjust; illegal.
• adj. (archaic) Catachrestic.
• adj. (archaic) Full of abuses; practicing abuse; containing abuse, or serving as the instrument of abuse.
• adj. Prone to ill treat by coarse, insulting words or by other ill usage; vituperative; reproachful; scurrilous.
• adj. (obsolete) Tending to deceive; fraudulent.
• adj. (archaic) Given to misusing; also, full of abuses.
• adj. (obsolete) Given to misusing.
• adj. Being physically injurious; characterized by repeated violence.

adverse

• adj. Unfavorable; antagonistic in purpose or effect; hostile; actively opposing one's interests or wishes;…
• adj. Opposed; contrary; opposing one's interests or desire.
• adj. (not comparable) Opposite; confronting.

bad

• adj. Not good; unfavorable; negative.
• adj. Not suitable or fitting.
• adj. Seemingly non-appropriate, in manners, etc.
• adj. Unhealthy.
• adj. Tricky; stressful; unpleasant.
• adj. Evil; wicked.
• adj. Faulty; not functional.
• adj. (of food) Spoiled, rotten, overripe.
• adj. (of breath) Malodorous, foul.
• adj. (informal) Bold and daring.
• adj. (hip-hop slang) good, superlative.
• adj. (of a need or want) Severe, urgent.
• adv. (now colloquial) Badly.
• n. (slang) Error, mistake.
• n. (countable, uncountable, economics) An item (or kind of item) of merchandise with negative value; an unwanted…
• adj. (slang) Fantastic.
• v. (archaic) Alternative past tense of bid. See bade.
• v. (Britain, dialect, transitive) To shell (a walnut).

baneful

• adj. Exceedingly harmful; causing harm, death, ruin.
• adj. Deadly or sinister.
• adj. Portending disaster.
• adj. (archaic) Poisonous.

bruising

• v. present participle of bruise.
• n. (slang) A violent physical attack on a person.

calumniatory

• adj. Containing calumny; slanderous.

calumnious

• adj. possessing the traits of calumny.

catastrophic

• adj. Of or pertaining to a catastrophe.
• adj. Disastrous; ruinous.

corrupting

• v. present participle of corrupt.

counterproductive

• adj. More of a hindrance than a help.

damaging

• v. present participle of damage.
• adj. Harmful; injurious; causing damage.
• n. An act of causing damage.

dangerous

• adj. Full of danger.
• adj. Causing danger; ready to do harm or injury.
• adj. (colloquial, dated) In a condition of danger, as from illness; threatened with death.
• adj. (obsolete) Hard to suit; difficult to please.
• adj. (obsolete) Reserved; not affable.

deadly

• adj. (obsolete) Subject to death; mortal.
• adj. Causing death; lethal.
• adj. Aiming or willing to destroy; implacable; desperately hostile.
• adj. (by extension) Very accurate (of aiming with a bow, firearm, etc.).
• adj. (informal) Very boring.
• adj. (informal) Excellent, awesome, cool.
• adv. (obsolete) Fatally, mortally.
• adv. In a way which suggests death.
• adv. Extremely.

defamatory

• adj. damaging to someone's reputation, especially if untrue.

degrading

• v. present participle of degrade.
• adj. that degrades.

deleterious

• adj. Harmful often in a subtle or unexpected way.

denigrating

• v. present participle of denigrate.

denigrative

• adj. Synonym of denigratory.

denigratory

• adj. Tending to denigrate.

destructive

• adj. Causing destruction; damaging.
• adj. Causing breakdown or disassembly.
• adj. (computing) Lossy; causing irreversible change.

detrimental

• adj. Causing damage or harm.

disadvantageous

• adj. Not advantageous.

evil

• adj. Intending to harm; malevolent.
• adj. Morally corrupt.
• adj. Unpleasant, as in 'an evil smell'.
• adj. Producing or threatening sorrow, distress, injury, or calamity; unpropitious; calamitous.
• adj. (obsolete) Having harmful qualities; not good; worthless or deleterious.
• adj. (computing, programming, slang) undesirable; harmful; bad practice.
• n. Moral badness; wickedness; malevolence; the forces or behaviors that are the opposite or enemy of good.
• n. Anything which impairs the happiness of a being or deprives a being of any good; anything which causes…
• n. (obsolete) A malady or disease; especially in the phrase king's evil (scrofula).

harmful

• adj. of a kind likely to be damaging; injurious.

hurtful

• adj. Tending to impair or damage; injurious; mischievous; occasioning loss or injury.
• adj. Tending to hurt someone's feelings; insulting.

ill

• adj. (obsolete) Evil; wicked (of people).
• adj. (archaic) Morally reprehensible (of behaviour etc.); blameworthy.
• adj. Indicative of unkind or malevolent intentions; harsh, cruel.
• adj. Unpropitious, unkind, faulty, not up to reasonable standard.
• adj. Unwell in terms of health or physical condition; sick.
• adj. Having an urge to vomit.
• adj. (hip-hop slang) Sublime, with the connotation of being so in a singularly creative way.
• adj. (slang) Extremely bad (bad enough to make one ill). Generally used indirectly with to be.
• adv. Not well; imperfectly, badly; hardly.
• n. (often pluralized) Trouble; distress; misfortune; adversity.
• n. Harm or injury.
• n. Evil; moral wrongfulness.
• n. A physical ailment; an illness.
• n. (US, slang) PCP, phencyclidine.

inauspicious

• adj. Not auspicious; ill-omened; unfortunate; unlucky; unfavorable.

inexpedient

• adj. Not expedient; not tending to promote a purpose; not tending to the end desired; unsuitable to time and…

injurious

• adj. Causing physical harm or injury; harmful, hurtful.
• adj. Causing harm to one's reputation; invidious, defamatory, libelous, slanderous.

inopportune

• adj. unsuitable for some particular purpose.
• adj. at an inconvenient or inappropriate time.

insidious

• adj. Producing harm in a stealthy, often gradual, manner.
• adj. Intending to entrap; alluring but harmful.
• adj. (nonstandard) Treacherous.

libellous

• adj. (British spelling) Alternative spelling of libelous.

libelous

• adj. (US) defamatory, libeling, referring to something that causes harm to someone's reputation especially…
• adj. (US) meeting the legal standards for libel.

malign

• adj. evil or malignant in disposition, nature, intent or influence.
• adj. malevolent.
• adj. (oncology) malignant.
• v. (transitive) To make defamatory statements about; to slander or traduce.
• v. (transitive, archaic) To treat with malice; to show hatred toward; to abuse; to wrong.

minus

• conj. (mathematics) Difference of the previous number from the following number.
• prep. (informal) Without.
• adj. (mathematics) Negative.
• adj. On the negative part of a scale.
• adj. (postpositive) Ranking just below a designated rating.
• n. (mathematics) A minus sign (−).
• n. (mathematics) A negative quantity.
• n. A downside or disadvantage.

mischievous

• adj. Causing mischief; injurious.
• adj. Troublesome, cheeky, badly behaved.

negative

• adj. not positive or neutral.
• adj. (physics) of electrical charge of an electron and related particles.
• adj. (mathematics) of number, less than zero.
• adj. (linguistics, logic) denying a proposition.
• adj. damaging; undesirable; unfavourable.
• adj. pessimistic; not tending to see the bright side of things. (Often used pejoratively.).
• adj. Of or relating to a photographic image in which the colours of the original, and the relations of right…
• adj. (chemistry) metalloidal; nonmetallic; contrasted with positive or basic.
• adj. (New Age jargon) (pejorative) bad, unwanted, disagreeable, potentially damaging, to be avoided, unpleasant,…
• adj. Characterized by the presence of features which do not support a hypothesis.
• n. refusal or withholding of assents; veto, prohibition.
• n. (law) a right of veto.
• n. (photography) an image in which dark areas represent light ones, and the converse.
• n. (grammar) a word that indicates negation.
• n. (mathematics) a negative quantity.
• n. (weightlifting): A rep performed with weight in which the muscle begins at maximum contraction and is…
• n. The negative plate of a voltaic or electrolytic cell.
• v. To veto; to refuse.
• v. To contradict.
• v. To disprove.
• v. To make ineffective, neutralize.
• interj. (signalling, law) An elaborate synonym for the word No.

nocent

• adj. (rare) Causing injury; harmful.
• adj. (obsolete) guilty; not innocent.
• n. (obsolete) Guilty person.

noxious

• adj. Harmful; injurious.

offensive

• adj. Causing offense; arousing a visceral reaction of disgust, anger, or hatred.
• adj. Relating to an offense or attack, as opposed to defensive.
• adj. (team sports) Having to do with play directed at scoring.
• n. (countable, military) An attack.
• n. (uncountable) The posture of attacking or being able to attack.

painful

• adj. Causing pain or distress, either physical or mental.
• adj. Afflicted or suffering with pain (of a body part or, formerly, of a person).
• adj. Requiring effort or labor; difficult, laborious.
• adj. (now rare) Painstaking; careful; industrious.
• adj. (informal) Very bad, poor.

pernicious

• adj. Causing much harm in a subtle way.
• adj. Causing death or injury; deadly.

pestilent

• adj. Highly injurious or destructive to life: deadly.
• adj. (informal) Annoying.
• adj. (archaic) Harmful to morals or public order.

prejudicial

• adj. exhibiting prejudice or bias.
• adj. causing harm or injury; detrimental, harmful or injurious.

ruinous

• adj. Causing ruin; destructive, calamitous.
• adj. Extremely costly; so expensive as to cause financial ruin.
• adj. Characterized by ruin; ruined; dilapidated; as, an edifice, bridge, or wall in a ruinous state.

slanderous

• adj. (of something said) Both untrue and harmful to a reputation.

stabbing

• adj. (of pain) sharp, intense.
• n. An incident in which a person is stabbed.
• v. present participle of stab.

subtle

• adj. Hard to grasp; not obvious or easily understood; barely noticeable.
• adj. (of a thing) Cleverly contrived.
• adj. (of a person or animal) Cunning, skillful.
• adj. Insidious.
• adj. Tenuous; rarefied; of low density or thin consistency.

toxic

• adj. (toxicology) Having a chemical nature that is harmful to health or lethal if consumed or otherwise entering…
• adj. (figuratively) negative, harmful.

unfavorable

• adj. Disadvantageous, adverse, unsuitable, inconducive; serving to hinder or oppose.
• adj. (of a belief, state of mind, etc) Not favorable, disapproving.
• adj. (of wind or weather) Causing obstacles or delay; not conducive to travel or work; inclement.
• adj. Not auspicious; ill-boding.

unfavourable

• adj. not approved of.
• adj. (of wind or weather) opposing or hindering.

unsafe

• adj. Not safe; dangerous.

untoward

• adj. Unfavourable, adverse, or disadvantageous.
• adj. Unruly, troublesome.
• adj. Unseemly, improper.

unwholesome

• adj. Not wholesome; unfavorable to health; unhealthy.
• adj. Not sound; diseased; tainted; impaired; defective.
• adj. Indicating unsound health; characteristic of or suggesting an unsound condition, physical or mental; repulsive;…

vesicant

• adj. Causing blistering to the skin.
• n. Any material that causes blisters upon contact with the skin.

vesicatory

• adj. (medicine) Causing blistering.
• n. (medicine) An agent that causes blistering.

wounding

• n. The act of inflicting a wound.
• n. An instance of being wounded.
• v. present participle of wound.