What Do These Eight Words Have in Common?

RAY: This is a word puzzler sent in by a fellow named Bob Dinger.

Each and every word in this list has the same unusual uniqueness in common. Here are the words:

Assess
Banana
Dresser
Grammar
Potato
Revive
Uneven
Voodoo

And here's a hint. If I left one of the words off the list, it wouldn't affect the answer. What do these words have in common?

Think you know? Drop Ray a note!

[ Car Talk Puzzler ]