"Before-mentioned" is a synonym for "aforementioned," but there are numerous other options to choose from. Other synonyms for before-mentioned include "previously mentioned," "aforenamed," "said," "named," and "mentioned." In certain contexts, "prior," "past," "foregoing," "aforesaid," and "previously stated" can also serve as suitable substitutes. It's important to vary language and avoid repetition when writing, and utilizing synonyms for frequently used words like "before-mentioned" can help achieve that goal. While "before-mentioned" may be the most common choice for some, there are plenty of other options that can add more depth and variety to one's writing.