Aka is an acronym for the phrase 'also known as.' This abbreviation is commonly used in formal documents and informal conversations as an alternative term for an alternate name a person or thing is known by. Synonyms for aka include the phrase 'alias,' which means a name that is not one's legal name, and 'pseudonym,' which means a fictitious name an author or writer uses. Other synonyms include the phrase 'stage name' or 'pen name.' The term 'nicknames' and 'monikers' can also be used in place of aka. Overall, these synonyms, including aka, all refer to alternate identities and names that a person or thing could be recognized by.