When it comes to synonyms for the word "patent," there are a few options to consider. For starters, "copyright" is a term that is closely related to patent, as it refers to the legal protection of creative works, such as books, music, and software. "Trademark" is another related term, referring to the protection of logos, slogans, and other branding elements. Additionally, "intellectual property" is a broad term that encompasses both patents and copyrights, as well as trade secrets and other forms of valuable proprietary information. Finally, one might use the term "exclusive right" as a synonym for patent, as patents grant their holders the exclusive rights to use, make, and sell their inventions.