I wouldn't exactly call it friendship; more a kind of mutual parasitism.

Go in peace, for the sake of what I call - friendship.

"That is what I call devoted friendship, to recommend to another one whom you would not marry yourself."

"No, I would not call it friendship," Nicola agreed, her blue eyes dancing.

This is the highest level of philia, and in modern English might be called true friendship.

And that is what friends call friendship.

You don't have to call it marriage; you can call it a deep and abiding friendship, but you can't bless it.

It is a chance, my reverend companion," said D'Artagnan, "that I will call friendship.

Of course, there was what one might call friendship, a physical need for intimacy.

This is called admirable friendship.