Please dnt see me as a freak or anythin, i was watchin a movie, "The Game of Thrones" where the Lannister Imp was accused of killing his nephew Joeffry, then the imp was tell his elder brother Jamie the types of killing then i decided to look it up online behold every killing has a name except killing of one' cousin..

Suicide – intentional killing of self.
Autocide – suicide by automobile.
Medicide – a suicide accomplished with the aid of a physician
Murder-suicide - a suicide committed immediately after one or more murders
Self-immolation – suicide by setting oneself on fire, a form of extreme protest.
Suicide by cop – a suicide by acting threateningly, thereby inducing law enforcement personnel to shoot one to death.
Avunculicide - the act of kiling one's uncle
Familicide - is a multiple-victim homicide where a killer's spouse and children are slain.
Feticide (or foeticide) - the act of killing a fetus in the uterus or causing an abortion
Filicide – the act of a parent killing his or her son or daughter. ("filius" being Latin for son)
Fratricide – the act of killing a brother, also in military context death by friendly fire.
Geronticide – the abandonment of the elderly to die, commit suicide or be killed. See also Senicide.
Honour-killing – the act of killing a family member who has or was perceived to have brought disgrace to the family.
Infanticide – the act of killing a child within the first year of its life.
Mariticide - the act of killing one's spouse, especially the murder of a husband by his wife.
Matricide – the act of killing one's mother.
Neonaticide - the act of killing an infant within the first twenty-four hours or month (varies by individual and jurisdiction) of its life.
Nepoticide - the act of kiling one's nephew
Parricide – (also Parenticide) the killing of one's mother or father or other close relative.
Patricide – the act of killing of one's father.
Prolicide – the act of killing one's own children.
Senicide – the killing of one's elderly family members when they can no longer work or become a burden. ("senex" being Latin for old man)
Sororicide – the act of killing one's sister.
Uxoricide – the act of killing one's wife ("uxor" being Latin for wife)
Amicicide – the act of killing a friend. ("amicus" being Latin for friend)
Androcide - the systematic killing of men.
Capital punishment – the judicial killing of a human being for odious crimes.
Democide - the murder of any person or people by a government
Ecocide - the destruction of the natural environment by such activity as war, overexploitation of resources, or pollution
Euthanasia (also mercy killing) – the killing of any being for compassionate reasons i.e. significant injury or disease.
Femicide (also Gynecide, Gynaecide, or Gynocide) – the systematic killing of women
Gendercide - the systematic killing of members of a specific sex, either males or females
Genocide – the systematic extermination of an entire national, racial, religious, or ethnic group.
Homicide – the act of killing of a person ("homo" being Latin for man)
Human sacrifice – the killing of a human for religious reasons
Murder - the malicious and unlawful killing of a human by another human
Manslaughter - Murder, but under legal mitigating factors
Omnicide – the act of killing all humans, to create intentional extinction of the human species. ("omni" meaning all)
Paedocide - the act of killing a child or children.

Wow what about mouto-cide the act of killing somebody with ur mouth....

What if I kill GMB what will it be called?

F-ing stupid assassination, premeditated murder, et all, @donmalcolm21.

@ OP, that's because it's still homicide.

Those special names exist only because people doing them have specific ways of carrying them out, not because they would be different in what act is done. It's still homicide/murder of a person or a group of people.

Bokocide.......d act of killin by bombin