We don't have synonyms for win-win yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are win win and winwin.
"The internship requirement for graduation has proved to be a win-win venture; companies receive the benefit of creative students with cutting-edge technical skills, while the students gain real-world experience in their chosen profession."
"The internship requirement for graduation has proved to be a win-win venture; companies receive the benefit of creative students with cutting-edge technical skills, while the students gain real-world experience in their chosen profession."