noun
decapitation
dih-kap-ih-TAY-shuhn/dɪˌkæpɪˈteɪʃn/
The act or result of cutting off a head.
The cook’s decapitation of the fish separates its head from its body.

Etymology
“Off” and “head” express the literal removal of the head. The action-noun ending names the act of beheading or the fact of being beheaded.
In context
I have not thankfully had too much experience with decapitation, but the way a person handles that, you embalm the head independently from the rest of the body
More examples
- The damaged statue showed signs of deliberate decapitation.
- The court record named decapitation as the sentence.
- The exhibit discussed the decapitation of royal statues during the revolt.
Forms
decapitation
decapitate verb — cut off a head
Similar words
- beheading
- Beheading is the ordinary equivalent; decapitation is more formal and can also describe damage to a statue.