Waster
Part of speech: noun
Definition: One who, or that which, wastes; one who squanders; one who consumes or expends extravagantly; a spendthrift; a prodigal. An imperfection in the wick of a candle, causing it to waste; -- called also a thief. A kind of cudgel; also, a blunt-edged sword used as a foil.
Ruiner
Part of speech: noun
Definition: someone who ruins.