Yes, i think they have Friendship. Every Boy have someone they stay next to him. When you go to Waaagh, then you go with da Boys they you like.
Orks do actually have friendships though they're somewhat like rivalries . The ork term for friend "grod" means frien or favriote enemy because in ork culture the 2 are synonomous but yea they do also sit down and chat with other orks over at the grog cooler or something. And they do tend to mob together with friends
At first I thought this thread title was going to be "Are Orkz capable of friendly fire?" DA ANZER TA BOTH IZ NO! ERRYBUDDY GETZ DA CHOPPA! JUZ A MATTER OF IN WOT ORDA!