How many palindromes aboard ship? Can't say I ever sailed with any, but there were always a few
perverts, poofters, Poles and guys from Pompey.
Seriously though, this question requires the mind of a language professor, and apart from
the three already mentioned I doubt if there are any more to be discovered. But, what the
hell do I know?
You sure pick some tough questions, I'll say that much.

But keep em coming.