I don't really know what to recommend -- on my recs page I just don't worry about it, as I have the stories categorized by pairing. I put a disclaimer saying that not all of the pairings are shippy, and left it at that. If people complain about it, they haven't done it to my face. :-P

Could you use "no ship" instead of friendship? Or would that signify that there was no FRIENDship as well? "Not shippy?"

Beats me.

Hope you can come up with something you like. :-)