Synonyms of the loanword "cum"
With the unfortunate modern connotation, it may be better just to omit the word. Instead of using studio-cum-office, just use studio-office. It will be understandable.
The meaning of cum in this sense is "combined" or "with" (from the Latin for "with").
For example a workshop-cum-garage.
Some other ways of expressing that could be:
- A combined workshop and garage
- A combined workshop/garage (you would pronounce this "a workshop slash garage")
- A combination workshop/garage
- A workshop/garage
- A workshop that doubles as a garage
etc