Can you use tennis rackets for racquetball?

As far as necessities go you need the following:

1)A Racquetball Court

2)A Racquetball Racquet

3)A Racquetball

4)Goggles; most places due to safety won't allow you to play without them, and it wouldn't be a good idea.

The extra stuff includes, but is not limited to:

1)Headband

2)Armband

3)Glove

4)Underglove