1. 7 synonyms for Behead: decapitate, execute, guillotine, truncate, decollate, decapitate, decollate

2. Behead - cut the head of; "the French King was Beheaded during the Revolution" decapitate , decollate kill - cause to die; put to death, usually intentionally or knowingly; "This man killed several people when he tried to rob a bank"; "The farmer killed a pig for the holidays"