harmful Synonyms

injurious pernicious dangerous deleterious destructive detrimental unhealthy evil malignant hazardous hurtful poisonous toxic noxious ruinous maleficent malicious damaging unsafe catastrophic crippling scathful unsanitary slaughterous subversive threatening septic unhelpful unhealthful unfavourable toxicant traumatic sapping risky ominous painful pathogenic perilous pestiferous pestilent pestilential vesicatory inimical prejudicial treacherous unchancy wrackful unwholesome hurtsome habit-forming