1. The killer or the killing of a king.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• reiside,
• readicide,
• megilidae,
• eegicide,
• degicide,
• tegicide,
• 5egicide,
• 4egicide,
• regicider,
• regicid,
• regicied,
• ragicide,
• regiside,
• ciricide,
• teniacide,
• reviridae,
• angioide,
• legimine,
• pericide,
• ragidie

• register,
• registry,
• registered.

The adjective form of the word "regicide" is "regicidal".

The plural of the "regicide" can be the "regicides".

The singular of the "regicide" can be the "regicide".