Behead is a term used to describe the act of killing someone by removing their head from their body. The crossword solutions for this term are KILL (4 letters), SEVER (5 letters), EXECUTE (7 letters), GUILLOTINE (10 letters), DECOLLATE (9 letters), and DECAPITATE (10 letters). All of these words refer to the same action, but vary in terms of the method used to carry out the act. KILL and EXECUTE are general terms that can refer to any form of execution, while SEVER, GUILLOTINE, DECOLLATE, and DECAPITATE are more specific terms that refer to the use of a sharp object or machine to remove the head from the body.