diffrence between murder and kill

If you kill someone or something, you are the cause death. It may or may not be intentional.

If you murder someone, you commit the crime of murder, which means you killed the person on purpose.

Longman Thesaurus Dictionary says:
murder - to deliberately kill someone
commit manslaughter - to kill someone without intending to
commit suicide - to deliberately cause your own death
assassinate - to deliberately kill an important person, especially a politician
slaughter/massacre - to kill a large number of people in a violent way
execute somebody/put somebody to death

razanal HelloKill and murder have the same meaning so what's the different between them. E.g: You don't kill time , you murder it.

It is a little joke, very little. There is an expression "to kill time", which means to do something unimportant while you are waiting for something else. The expression is invariable, as are all such expressions; you can't be said

Maybe it can suggest that the person is killing time doing something really really useless, or something like that, can't it? And it sounds like a nice pun to me.....

Yes, I think it must be something like that. It isn't clear to me, either.