Synonyms for destructive

modified

1. Unfavorable

   adverse, negative, not constructive; see unfavorable 2.

2. Destroying

   ruinous, noxious, baneful, pestiferous, noisome, cancerous, fatal, deleterious, pestilential, catastrophic, calamitous, disastrous, productive of serious evil, cataclysmal, eradicative, fell, demolitionary, devastating, dire, lethal, extirpative, internecine, mortal, mischievous, detrimental, annihilative, hurtful, harmful, arsonistic, conflagrative, subversive, incendiary, murderous, disruptive, suicidal, evil, injurious, venomous, pernicious, toxic, baleful, disintegrative, corrosive, corroding, erosive, eroding, damaging; see also deadly 1, harmful, poisonous.

   Antonyms helpful*, curative, life-saving.