^I don't think "mub" is a word, so I don't think that counts. I have a few more examples:
cock
coke
easy
fall off
kick
meme
none
oh no
rare
rear
roar
row four
sass
selfless
Zs
That's all I can think of without resorting to using WRITTEN palindromes. Can you think of any other examples? They don't have to be in English, by the way.