1998 Dodge Dakota Loose Spark Plug

I recently moved and I didn't have a vehicle. So I bought a 98 Dodge Dakota just to get around untill I get something nicer. It's a nice enough truck but I bought it used of course and it was from Vermont so there is a good bit of rust on it. Anyway theres a noticeable clicking sound when when I'm driving. I can hear it coming from the drivers side of the engine. I originally thought it was an exhaust leake but I had that fixed and it's still doing it. So I was just checking stuff out the other day and I noticed that one of the spark plugs on the drivers side of the engine is loose. I took it out and it's like the hole that the spark plugs screws into is stripped so it wont tighted all the way. The truck runs and thats all I need it to do but I wonder what I could do to temporaroly fix it. I dont know what kind of damage it could do to the engine and I dont know what to do to fix it that would have less of a chance of damaging the engine. Please let me know if anyone has any suggestions.