Do you guys think Leliana would call Morrigan a friend and vise versa?
A lot could change over the course of 10 years I suppose, but I'd be surprised if either of them referred to the other as a friend. As of DA:O at least they were not friends, and potentially rivals. The banter between them in DA:O generally ranged from snarky to downright hostile.
On the other hand it wouldn't be the first time Bioware took two characters who didn't particularly like one another in one game, and had them develop a friendship in the sequel. In Mass Effect 1 Garrus is fairly mean to Tali in those elevator conversations and doesn't seem to particularly like Quarians. Over the course of ME2 and ME3 however they develop a close friendship, and potentially (if neither is romanced by Shepard) end up as friends with benefits in the final game.