What are some long near palindromes, i.e., words that except for one letter would be palindromes?

Here are the longest near palindromes in Webster's Ninth Collegiate:
catalatic                footstool                red pepper
detonated                locofocos                red spider
dew-clawed                nabataean                retreater
eisegesis                possessor                stargrass
foolproof                ratemeter                webmember