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I want to know what is the longest palindrome word.

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3  
The two shortest palindrome words, excluding one-letter words and abbreviations, are: aa (a basaltic lava) and oo (aka ‘Ō‘ō, aka o-o; an extinct Hawaiian bird) – F'x Feb 23 '11 at 9:13

closed as general reference by FumbleFingers, kiamlaluno, RegDwighт♦ Jul 1 '12 at 14:11

This question is too basic; it can be definitively and permanently answered by a single link to a standard internet reference source designed specifically to find that type of information. See the FAQ for guidance on how to improve it.

3 Answers

up vote 13 down vote accepted

Detartrated.

Edit: surprise, surprise, Wikipedia has more:

The longest palindromic word in the Oxford English Dictionary is the onomatopoeic tattarrattat, coined by James Joyce in Ulysses (1922) for a knock on the door. The Guinness Book of Records gives the title to detartrated, the preterit and past participle of detartrate, a chemical term meaning to remove tartrates. Rotavator, a trademarked name for an agricultural machine, is often listed in dictionaries. The term redivider is used by some writers but appears to be an invented or derived term—only redivide and redivision appear in the Shorter Oxford Dictionary. Malayalam, an Indian language, is of equal length.

So let's see:

tattarrattat  (onomatopoeic)
detartrated
Rotavator     (trademark)
redivider     (disputed)
Malayalam
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thank you RegDwight. can you tell me the meaning of the of the word – khan Feb 23 '11 at 9:08
5  
@khan: it's a link. Click on it. \(^_^)/ – RegDwighт♦ Feb 23 '11 at 9:10
thanks again regDwight – khan Feb 23 '11 at 9:14
I suspect that tattarrattat was invented to be palindromic, so I don't think it should count! – Nathan MacInnes Feb 23 '11 at 15:29
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There is also aibohphobia, the fear of palindromes. :-) – ShreevatsaR Feb 24 '11 at 6:11
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up vote 0 down vote

Not that long, but indisputable: racecar

(Though my browser does not care for the spelling. Did my 6th grade English teacher mislead me?)

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up vote 0 down vote

How about an eatery in northern California called the Yrekabakery?

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"Yreka Bakery" is two words. – ShreevatsaR Feb 24 '11 at 6:07

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