Slash v. Hyphen
Use a slash to show that two words share an interchangeable relationship; use a hyphen to join two words but keep their meanings separate.
IMPOSSIBLE AND TROUBLING IF YOU THINK ABOUT IT: “daddy/daughter dance”
MORE ACCEPTABLE AND ANATOMICALLY WITHIN REASON: “daddy-daughter dance”
The question to ask when deciding which to use is: do I mean to present these words in an either-or context (he/she) or as two distinct things that have come together to form a single meaning (the Sprint-AT&T merger)?