Synonyms of harmful

harmful

adjective

as in detrimental

causing or capable of causing harm

DDT has been proven to be extremely harmful to the environment

Synonyms & Similar Words

• detrimental
• damaging
• dangerous
• adverse
• bad
• hazardous
• poisonous
• injurious
• deleterious
• pernicious
• evil
• hurtful
• infectious
• prejudicial
• noxious
• baneful
• mischievous
• wicked
• ill
• destructive
• nocuous
• hostile
• baleful
• unsafe
• deadly
• lethal
• infective
• risky
• venomous
• threatening
• inimical
• sinister
• unfriendly
• insidious
• ominous
• contagious
• fatal
• unhealthy
• menacing
• perilous
• unhealthful
• unwholesome
• malignant
• pestilential
• pestiferous
• unsound
• ruinous
• pestilent
• killer
• nasty
• imperilling
• jeopardizing
• imperiling
• parlous
• noisome

Antonyms & Near Antonyms

• harmless
• beneficial
• benign
• safe
• innocuous
• useful
• innocent
• advantageous
• inoffensive
• favorable
• good
• helpful
• healthy
• healthful
• wholesome
• propitious
• remedial
• salutary
• anodyne
• curative
• salubrious
• sound
• hurtless
• palliative
• secure
• nontoxic
• nonpoisonous
• benignant
• nondestructive
• noninfectious
• noncorrosive
• nonfatal
• nonlethal
• nonpolluting
• nonvenomous