More than 1,000 people have been killed by the armed forces. [be VERB-ed]
He had attempted to kill himself on several occasions. [VERB pronoun-reflexive]
Cattle should be killed cleanly and humanely. [VERB pronoun-reflexive]
The earthquake killed 62 people. [VERB noun]
There are several words which mean similar things to kill. To murder someone means to kill them deliberately. Assassinate is used to talk about the murder of an important person, often for political reasons. If a large number of people are murdered, the words slaughter or massacre are sometimes used. Slaughter can also be used to talk about killing animals for their meat.