Allonyms are words used in place of someone's real name. Synonyms for allonym include pseudonym, pen name, nom de guerre, and alias. A pseudonym is a fictitious name used by an author as a substitute for their real name. A pen name is a literary pseudonym used by an author to conceal their identity. A nom de guerre is another term for a pseudonym used by soldiers or warriors, often in a military context. An alias is a false name used to conceal one's identity or to assume a false identity. These synonyms for allonym all represent ways in which people can disguise their real names to protect their privacy or for creative purposes.