Superdetective is a term commonly used to describe an exceptional detective, crime-solver or sleuth. If you're looking to describe an exceptional detective with a different phrase, here are some synonyms to consider. 'Ace detective' is a phrase that conveys a sense of confidence and expertise. If you're looking for something with a little more flair, 'master sleuth' is a phrase that's perfect to use. You can also use 'crime-buster', 'investigative genius,' or 'savvy sleuth' as colorful alternatives. Whatever words you choose, make sure they capture the essence of what it means to be a superdetective.