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.

厳粛[genshuku] gravity
綱紀粛正[koukishukusei] eliminating corruption among government officials
自粛[jishuku] self-control
粛として[shukutoshite] quietly
粛学[shukugaku] school purge

粛軍[shukugun] army purge
粛殺[shukusatsu] withering
粛正[shukusei] regulation
粛清[shukusei] (political) purge
粛党[shukutou] cleaning up (political party)