lethiferous

calamitous cataclysmic catastrophic damaging deadly detrimental disastrous fatal harmful hurtful lethal pernicious ruinous suicidal toxic

annihilative baleful baneful cancerous consumptive cutthroat deleterious dire eradicative evil extirpative fell internecine mortal noisome noxious pestiferous pestilential slaughterous venomous wrackful wreckful

advantageous assisting beneficial blessed favorable fortunate harmless healthful helpful kind life-giving wholesome

aiding building creative encouraging hopeful positive productive