Find the Ambigrams

To the left is a grid full of words. Some of the words are ambigrams and some are not. Can you spot the ambigrams? Click on the image to flip.

Some letters of the English alphabet are naturally symmetrical. Like the letter "X." If you turn it upside-down it is still an X. If you make whole words out of symetrical letters, we call the words Ambigrams.

Hint: All the words that are still readable are ambigrams.

Credits: Java Applet ©1999. Tony Azevedo