Enigma project is a term used to describe a project that is shrouded in mystery and complexity. However, there are several synonyms that can be used to describe such a project. For instance, a project may be referred to as a mystery project, a puzzle project, an enigmatic project or a cryptic project. Other synonyms include a riddle project, a conundrum project, a mysterious project or a baffling project. All of these terms describe a project that is difficult to understand, solve or unravel. These synonyms can help to add variety and depth to your writing, while still conveying the same meaning as "enigma project".