The Oxford Thesaurus An A-Z Dictionary of Synonyms - killing n.

1) murder, carnage, butchery, execution, slaughter, bloodshed, death, massacre, genocide, liquidation, mass murder or destruction, decimation, extermination, blood bath, manslaughter; slaying, homicide, fatality: The killing of dissidents must stop. There has been another killing in the park. 2) coup, bonanza, success, windfall, stroke of luck, gain, profit, Colloq Brit bomb: They've made a killing on the Stock Exchange. --adj. 3) devastating, ruinous, destructive, punishing, exhausting, debilitating, fatiguing, tiring, enervating, difficult, arduous: How can you keep up the killing pace of having two jobs?