A beheading device is a gruesome historical tool that was commonly used to execute criminals or prisoners of war. However, the term "beheading device" has a negative connotation due to its violent nature. Therefore, the English language offers various synonyms that can be used instead of "beheading device," including guillotine, decapitator, and executioner's sword. These words are more appropriate because they don't convey the same level of morbidity as the term "beheading device." While these synonyms aren't pleasant either, they are less likely to evoke strong emotional reactions. Also, their usage can help to make the discussion of a beheading less gruesome.