anyway, found a site "fun with word" (link from wiki) which have all kind of killing and it was even in category, there are eight category;
1.Killing One's Relations, (personal favorite)
Killing oneself -suicide, selfcide
Killing one's father - patricide
Killing one's mother - matricide
Killing one's parent(s) - parenticide
Killing one's brother - fratricide
Killing one's sister - sororicide
Killing one's husband - mariticide, viricide
Killing one's wife - uxoricide
Killing one's son or daughter - filicide, prolicide
Killing a close relative - parricide
(all 13 words that have to do with killing family, great right??)
2.Killing Other People – Murder,
Killing a friend - ambicide
Killing an enemy - hosticide
3.Killing Animals – Slaughter,
Killing of cats - felicide
Killing of whales - ceticide
Killing of wolves - lupidide
4.Killing Insects
Killing of bees -apicide
5.Medicines And Drugs That Exterminate,
Killing of Sperm - spermicide, spermatocide, spermatozoicide6.Killing Plantlife,
Killing of flowers - floricide7.Other Death, Annihilation, and Obliteration,
Killing facts (distorting the truth) - facticide
Ruining a suitor's chances - suitorcide
Ruining someone's reputation - famicide8.Extreme Death, Killing, Destruction, and Extermination
Destruction of everything - onmicide
Destruction of the entire world - mundicide
Destruction of the natural world - ecocide
Killing of all people - populicide
Extermination of an entire racial, political, or cultural group - genocidehaha.. that's all about killing..
there are like 200++ word that have to do with killing, above are just my own favourite