Assassination, slaying, massacre, bloodshed, destruction, kill, execute, eliminate...
kill, murder, extermanate
Rub outRuin
slaughter, murder, massacre, holocaust, havoc, bloodshed, shambles, mass murder
Wanting harm against, kill, murder, hurt,
killing, murder, massacre, slaughter, slaying, carnage, butchery, blood-letting
murderer, killer, slayer, liquidator, executioner, hit man, hatchet man
Kill and injure have several synonyms. Kill has murder, terminate, and defeat. Injure has maim, deface, harm, impair, and wrong.
There is no "scientific" word for murder it is a legal term defined as the unjustified and/or unlawful premeditated killing of one human being by another. Most synonyms for murder such as infanticide, homicide, regicide are based on some description to whom it happens ( homo "man") and a description of the act ( from the Latin -cidium "act of killing" )
They are synonyms.
Synonyms
Relative and kin are synonyms.
They are synonyms.