what is the Longest word in the dictionary with no repeated letter?
553148
The longest words with no repeated letters are dermatoglyphics, misconjugatedly and uncopyrightable.
1040091
there's 'antidisestablishmentarianism' at 28 letters, meaning 'opposition to the disestablishment of the Church of England'. It is often considered the longest word as it has an actual meaning instead of being created just to be long.
430389
smiles because it has a mile in between it, other than that the longest word is:\n\nMethionylglutaminylarginyltyrosylglutamylserylleucylphen- \nylalanylalanylglutaminylleucyllysylglutamylarginyllysylgluta- \nmylglysylalanylphenylalanylvalylprolylphenylalanylyalylthre- \nonylleucylglcycylaspartylprolylglicylisoleucyglutamylgluta- \nminlserylleucyllysylisoleucylaspartylthreonylleucylisoleu- \ncylglutamylalanylglyclyalanylaspartylalanylleucyglutamylle- \nucylgluycylisoleucylproluylphenylalanyserylaspartyprolylleu- \ncelalanylaspartylglycylprolylthreonylisolleucyglutaminylaspa- \nraginylalanythreonylleucylarginylalanylphenylalanylalanylal- \nanylglycylvalylthreonylprolylalanylglutaminylcysteinylphen- \nylalanylglglutamylmethionylleucyalanylleucylisoleucylarginyl- \nglutaminyllysylhistidylprolyuthreonylisoleucylprolylisoleuc- \nylglycylleucylleucylmethionyltyrosylalanylasbaraginylleucyl- \nvalylphenylalanylsparaginyyllysylglycylisoleucylaspartylglut- \namylphenylalanylyltyrosylalanylglutaminylcysteinylglutamyll- \nysylvalylglycylvalylspartylserylvalylleucylvallalanylaspart- \nylvalylprolylvalvlglutaminylglutamylserylalanylprolylpheny- \nlalalrginylglutaminylalanylalanylleucylarginylhistidylasp- \naraginylvalylalalprolylisoleucylphenylalanylisoleucylcystei- \nnylprolyprolylaspartylalanylaspartylaspartyspartyleucylle- \nucylarginylglutaminylisoleucylalanylseryltyroslglycylargin- \nylglycyltyrosylthreonyltyrosylleucylleucylserylarginlalanyl- \nglycylvalylthreonylglycylalanylglutamylasparaginylarginyla- \nnylalanylleucylprolylleucylaspaaginylhistidylleucylvalylalan- \nyllysylleucyllysylglutamyltyrosylasparagimylalanylalanypro- \nlylprolylleucylglutaminylglycylphenlalanylglycylisoleyucyls- \nerylalanylprolylaspartylglutaminylvalyllysylalanylalanylisol- \neucylalspartylalanylglycylalanylalanylglycylalanylasoleucylse- \nrylglycylserylalanylisoleucylbalyllysylisoleucylisoleucylgluta- \nmylglutaminylhistidylasparaginylisoleucylglutamylpronylglu-0 \ntamyllysylmethionylluecylalanylalanyoeucyllysylvalylpheny- \nlalanylvalylglutamilylprolylmethionyllysylalanylalanylthreo- \nnylarginylserine.\n\n\nalso, \npneumonoultramicroscopicsilico-\nvolcanoconeyosis\n\nantidisestablishmentarynism\nflaucinaucihilipilification
668484
TYPEWRITER is the longest word that can be made using the letters only on one row of the keyboard.
12157
"Rhythm" and "syzygy" are the longest English words without vowels.
15027
That's not true. The official longest word is over 64,000 characters long. It is theoretical mature protein compound.
52726
"Official" longest word\nThe Guinness Book of Records, in its 1992 and subsequent editions, declared the "longest real word" in the English language to be floccinaucinihilipilification at 29 letters. Defined as the act of estimating (something) as worthless, its usage has been recorded as far back as 1741. In recent times its usage has been recorded in the proceedings of the United States Senate by Senator Jesse Helms, and at the White House by Bill Clinton's press secretary Mike McCurry, albeit sarcastically. It is the longest non-technical word in the first edition of the Oxford English Dictionary. The acceptability of the 33-letter adverbial form floccinaucinihilipilificastically is subject to controversy.
1155446
Floccinaucinihilipilification at 29 letters is the longest word in Englsih.
162018
The full name of the tryptophan synthetase A protein is meth...rine (replace the ellipses with 1905 letters). But scientific words don't count because they can always be compounded.\n\nFloccinaucinihilipilification ("the act or habit of esteeming or describing something as worthless") is the traditional Guinness Book of Records champion word.\n\nWikipedia actually has a nice article on other contenders:\nhttp://en.wikipedia.org/wiki/Longest_word_in_English
22315
"Euouae, six letters long, is the longest English word consisting only of vowels, and, also, the English word with the most consecutive vowels."
22433
pneumonoultramicroscopicsilicovolcanokoniosis this is the longest word I found with a total of 45 letters.\n Born nerd NOPE\n  http://www.fun-with-words.com/wordplay_articles.html\nthis is one of my favorite sites for word games and info nerd or not. Have fun
267058
PNEUMONOULTRAMICROSCOPICSILICOVOLCANOCONIOSIS (45 letters; a lung disease caused by breathing in certain particles) is the longest word in any English-language dictionary.
1152558
Hey Sethu, Since your question is posted in the "Words and Wordplay" section, I think the longest word in English should be the word 'SMILES'. How? From the start to the end, it is a MILE long. :-)
745105
http://en.wikipedia.org/wiki/Methionylthreonylthreonyl...isoleucine\n\ndescribes element\n\npneumono­ultra­micro­scopic­silico­volcano­coniosis\n\nreal longest word^
199298
'facetiously' is the only 11-letter word that has all the vowels in order (a,e,i,o,u,y)\n\n'typewriter' is the only 10-letter word that can be typed using only the top row of keys on a keyboard.\n\n'gypsy' & 'pygmy' are the only 5-letter words, in which, the only vowel is  'y'\n\nmore words begin with 'S' than any other letter in English. Top Ten: 1)S\n2)C\n3)P\n4)A\n5)T\n6)M\n7)E\n8)D\n9)R\n10)F\n\nThere are three words in English that repeat one letter 6 times: 'degenerescence', 'indivisibility', and 'nonannouncement'\n\n1,000 (one thousand) is the 'earliest' number that has the letter 'a' in it\n\nthe only 4-letter word that ends in 'e-n-y' is 'deny'\n\nAll the letters listed on an eye-chart: 'C,D,E,F,L,O,P,T,Z'\n\nthe only anagram of the word 'chesty' is 'scythe'\n\nthe only letter not used in the spelling of the 50 U.S. states is 'Q'\n\nthe only 15-letter word that has no repeating letters is 'uncopyrightable'\n\n"I" the first person-singular is capitalized in English, the only language to do so.\n\nthe term 'jiffy' as in "in a jiffy" is equal to:\none one hundred thousand billion billionths of a second, according to lexicographers.\n--\nedit: -j.:'abstemiously' is 12-letters.  the first one says ''facetiously' is the only 11-letter word.
56756
typerwriter, pepperroot, pirouetter are all 10 letters long\nHowever, without a hyphen teetertotter is the longest (12).
644420
an infinite amount.  You didn't limit the length of the word. (the ^ symbol means "to the power of"):\n\n2 letter word = 26^2 possibilities\n4 letter word = 26^4\n10 letter word = 26^10 or 141,167,095,653,376\n\nit goes on and on...\n\nThe longest word generally accepted in the english dictionary is:\npneumonoultramicroscopicsilicovolcanoconiosis\nwhich has 45 letters\n26^45 = 4.7 x 10^63 (10 followed by 63 zeroes!)