executioner
Word family
Synonym discussion
Sense: noun/1
All four words describe someone who ends a life, but the social and legal frame differs sharply. 'Executioner' is the modern, neutral, official term: the person carries out a death sentence handed down by a court, and the method may be anything from lethal injection to a firing squad. 'Hangman' narrows the method to hanging and feels distinctly historical or informal — 'the state hangman of the 1950s' rather than 'today's hangman'. 'Headsman' is even more period-specific, evoking an axe or sword and a wooden block. 'Killer', by contrast, carries no official sanction at all; it simply names anyone who has killed, often with negative force. Compare: 'The executioner placed the rope around the prisoner's neck' (legal role) versus 'The killer left no fingerprints at the scene' (criminal act).
Common collocations
Etymology
From late Middle English, formed on the verb 'execute' plus the agent suffix '-er' (via Anglo-French and Latin 'exsequi', meaning to follow through or carry out an order). 'Execute' first meant simply 'to put into effect', and only later narrowed in legal English to 'carry out a death sentence'; the noun 'executioner' followed the verb into that specialised meaning by the 16th century.