Decapitator is a word that is generally used to indicate a person or tool that is used for beheading someone. However, there are many synonyms that can be used to describe the same concept in different ways. Some of the synonyms for decapitator are guillotine, chopper, ax, cleaver, and sword. Each of these words can be used in different contexts depending on the situation. Guillotine is historically associated with the French revolution, while chopper and ax can be used in the context of rural or tribal societies. Cleaver is generally associated with butchery, while a sword has a more romantic and historic connotation.