executioner's sword
executioner's sword is a longsword or decapitation device.
Overview
Usually a two-handed sword used as an executioner's tool of trade.
In detail
Its recorded use is decapitation and capital punishment.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Executioner's sword”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1188457: executioner's sword
Consult the source