I'm going to assume you're young. Other than calling people by their names, how about the words sir and ma'am. You can show respect without having to resort to calling everyone nikka. If it's one of your boys you can use bro, boss, homie, kid, guys, etc. If it's a girl or women, ladies works fine. Not no bytches, thots, hoes, skanks. Unless it's a jumpoff or other sex only female. You don't see other ethnicities calling each other spics, chinks, crackers, or anything like that. The word nikkas was made cool to be used by society. There's no need to be cool.