» Sat May 12, 2012 3:45 pm
Yeah, the Dungeons re-spawn after 72 - 96 hours in game time (or something close to that...I'm not sure on the exact time frame). However, once you clear a dungeon, it will always say "Cleared" even if the enemies have re-spawned. Like a person above me posted, it's an extremely useful way of keeping track of where you've been when you are hunting Word Walls.