Area - Arena, not just playing WoW either, in real world life activities.
Aura - Aurora, I can't even fathom where this comes from. Mostly hear this in wow.
Turret - Turrent, where do they find the extra N? Lots of Online games, WoW, HoN, LoL, DotA etc.
What are some of yours?
Edit: Loving all the replies, glad to see I'm not the only person. Just wish it would've stayed a bit more on topic.