Off
As a verb
Especially for murder
Annihilate
Assassinate
Blow away
Blow out
Bump off
Butcher
Cut down
Dispatch
Do away with
Do in
Eliminate
Eradicate
Execute
Exterminate
Knockoff
massacre
Mow
Mow down
Shoot down
Slaughter
Slay
Snuff
Take out
Terminate
Whack
Wipeout
Zap