ブチ殺す[buchikorosu] to kill by hitting
押殺す[oshikorosu] to crush to death
あっ殺[assatsu] crushing to death
暗殺[ansatsu] assassination
暗殺事件[ansatsujiken] assassination

一殺那[issetsuna] (a) moment
殴り殺す[nagurikorosu] to strike dead
殴殺[ousatsu] beating to death
皆殺し[minagoroshi] massacre
かみ殺す[kamikorosu] to stifle a smile, yawn, etc.

悪虐[akugyaku] atrocity
悪虐無道[akugyakubudou] treacherous
加虐[kagyaku] causing pain
加虐愛[kagyakuai] sadism
虐める[ijimeru] to tease

苛虐[kagyaku] cruel treatment
虐げる[shiitageru] to oppress
虐殺[gyakusatsu] atrocity
虐政[gyakusei] tyranny
虐待[gyakutai] abuse