"waster" in the noun sense
1. wastrel, waster
someone who dissipates resources self-indulgently
2. destroyer, ruiner, undoer, waster, uprooter
a person who destroys or ruins or lays waste to
"a destroyer of the environment"
"jealousy was his undoer"
"uprooters of gravestones"
Source: WordNet® (An amazing lexical database of English)
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