destructive

1 causing or tending to cause destruction the destructive storm blew down trees all over town, and blew the roof off our neighbor's house Synonyms annihilatory, calamitous, cataclysmal (or cataclysmic), devastating, devastative, disastrous, ruinous Related Words antibiotic, biocidal; baleful, deadly, deathly, fatal, fell, killer, lethal, mortal, murderous, pestilent, poisonous, virulent, vital; deleterious, detrimental, harmful, pernicious Near Antonyms preservative, protective; constructive, creative, formative, productive; harmless, innocent, innocuous, inoffensive; ameliorative, helpful, useful; healthful, healthy, nonfatal, nonlethal, salubrious, wholesome Antonyms nondestructive

2 bringing about ruin or misfortune technology used for destructive ends Synonyms calamitous, cataclysmal (or cataclysmic), catastrophic, damning, fatal, disastrous, fateful, ruinous, unfortunateRelated Words apocalyptic (also apocalyptical); hapless, ill-fated, ill-starred, luckless; adverse, baleful, baneful, damaging, deleterious, detrimental, evil, harmful, hurtful, ill, injurious, noxious, pernicious, prejudicialNear Antonyms fluky (also flukey), fortuitous, fortunate, happy, lucky, providential; auspicious, bright, encouraging, fair, golden, heartening, hopeful, optimistic, promising, propitious, rose-colored, rosy, upbeat