What do these seven words all have in common?

1. Banana

2. Dresser

3. Grammar

4. Potato

5. Revive

6. Uneven

7. Assess

The easy answer is that they all have at least 2 double letters. But in all of these words, if you take the first letter, place it at the end of the word, and then spell the word backwards, it will be the same word.