Similar word to feller:
annihilative,baleful, baneful,calamitous, cancerous, cataclysmic,catastrophic, consumptive, cutthroat,damaging,deadly,deleterious,detrimental,dire,disastrous, eradicative,evil, extirpative,fatal,fell,harmful,hurtful, internecine,lethal, lethiferous,mortal
annihilative,baleful, baneful,calamitous, cancerous, cataclysmic,catastrophic, consumptive, cutthroat,damaging,deadly,deleterious,detrimental,dire,disastrous, eradicative,evil, extirpative,fatal,fell,harmful,hurtful, internecine,lethal, lethiferous,mortal