Plasma or Plasma?

What's the difference? The same spelling but it can mean two things. It can mean a blood plasma, which by the way is beginning to be an issue with me. It looks to me that my professor is having this "trip" and he keeps giving us a bunch of things to do for his class. I can't keep up anymore. The thing about it is that I am not the type of student who is a slacker... I usually do good when it comes to keeping up with school work. But so far now all I can think of is plasma.

Another one that I can think of when I see the word plasma is a plasma mounts. Something that will make mounting your plasma tv a lot easier.

I have never really thought of any other word that have the same spelling but can mean different meaning. Two different meaning.

Do you know of any other words? If you do, share them here. I'd love to compile them and post them here.