regicide

English Thesaurus

1. the act of killing a king (noun.act)

hypernym	:	execution, murder, slaying,
definition	:	unlawful premeditated killing of a human being by a human being (noun.act)

2. someone who commits regicide; the killer of a king (noun.person)

hypernym	:	killer, slayer,
definition	:	someone who causes the death of a person or animal (noun.person)