One entry found for harmful.

Entry Word: harmful
Function: adjective
Text: causing or capable of causing harm <DDT has been proven extremely harmful to the environment>
Synonyms adverse, bad, baleful, baneful, damaging, deleterious, detrimental, evil, hurtful, ill, injurious, mischievous, noxious, pernicious, prejudicial
Related Words hostile, inimical, unfriendly; contagious, deadly, infectious, pestilent, pestilential, poisonous, venomous; insidious, menacing, ominous, sinister, threatening; dangerous, hazardous, imperiling, jeopardizing, parlous, perilous, risky, unsafe, unsound; nasty, noisome, unhealthful, unhealthy, unwholesome; destructive, fatal, lethal, malignant, ruinous
Near Antonyms advantageous, beneficial, useful; favorable, good, propitious; curative, healthful, healthy, helpful, palliative, remedial, salubrious, salutary, wholesome; secure, sound; benign, benignant; noncorrosive, nondestructive, nonfatal, noninfectious, nonlethal, nonpoisonous, nonpolluting, nontoxic, nonvenomous
Antonyms harmless, innocent, innocuous, inoffensive, safe