However, the world's longest acronym according to the Guinness Book of Words is NIIOMTPLABOPARMBETZHELBETRABSBOMONIMONKONOTDTEKHSTROMONT (56 letters, 54 in Cyrillic). Found in the Concise Dictionary of Soviet Terminology, it means: The laboratory for shuttering, reinforcement, concrete and ferroconcrete operations for composite-monolithic and monolithic constructions of the Department of the Technology of Building-assembly operations of the Scientific Research Institute of the Organization for building mechanization and technical aid of the Academy of Building and Architecture of the USSR [Stuart Kidd].
According to the Encyclopaedia Britannica (15th ed.) PAKISTAN is an acronym for the five Northern units of India - Punjab, North-West Frontier (Afghan) Province, Kashmir, Sind and Baluchistan, and was coined in 1933 by Choudhary Rahmat Ali (1895-1951). However, according to the World Book Encyclopedia (1976), Pakistan means "land of the pure" in Urdu [Charles Turner].
Seven-letter words from the OED2 with their letters in alphabetical order are: ACCENTY, ACCOMPT, ADDILLS, AFFORST, ALLOQUY, BEGHOST, BELLOOT, DEGLORY, FILLOPS, and FILLOTT [Philip Bennett].
Six-letter words with their letters in alphabetical order include: ABBEIT, ABBESS, ABBEST, ABDEST, ABHORS, ACCENT, ACCEPT, ACCESS, ACCLOY, ACCOST, ACHILL, ACKNOW, ADDEEM, ADDERS, ADEMPT, ADHORT, ADILLS, ADIPSY, ADORTY, AFFLUX, AGHILL, ALMOST, ANOPSY, BEFIST, BEFLOW, BEGILT, BEGINS, BEGIRT, BEKNOW, BELLOW, BENOTT, BIJOUX, BILLOT, BIOPSY, BLOOPS, BLOTTY, CHILLS, CHILLY, CHIMPS, CHINNY, CHINTZ, CHIPPY, CHIRRS, CHITTY, CHIVVY, CHOOPS, CHOOSY, CHOPPY, CLOOPS, CLOTTY, DEFLOW, DEFLUX, DEHORT, DIKKOP, DILUVY, DIMPSY, EFFLUX, EFFORT, ELLOPS, FILMOT, FLOORS, FLOPPY, FLOSSY, GHOSTY, GILLOT, GLOPPY, GLOSSY, GOOSSY, KNOPPY, and KNOTTY [Philip Bennett, Bruce D. Wilner, Mike Turniansky, Denis Borris, Stuart Kidd, Eric Brahinsky].
The following words in the on-line Scrabble dictionary have symmetrically distributed letters: WIZARD, HOVELS, BEVY, GIRT, GRIT, IZAR, LEVO, TRIG, VOLE, WOLD, BY, LO, and SH [Mark D. Lew, Dan Tilque, Bruce D. Wilner]. There is also ZYBA (a town in Kansas), which was named by taking the last two letters and the first two letters of the alphabet [Don Blevins in Peculiar, Uncertain & Two Egg]. POLK is the only last name of a U. S. President with symmetrically distributed letters. "Symmetrically distributed letters" means that, for example, in BEVY the B and Y are equidistant from the center, as are E and V.
Some common words which change from one to three syllables upon the addition of just one letter are: ARE/AREA, CAME/CAMEO, CRIME/CRIMEA, GAPE/AGAPE, HOSE/HOSEA, JUDE/JUDEA, LIEN/ALIEN, OLE/OLEO, RODE/RODEO, ROME/ROMEO, SMILE/SIMILE and WHINE/WAHINE. (Wahine is defined as a Polynesian woman or a female surfer in MWCD11.) There are numerous other examples involving more obscure words [Jim Lizzi, Stuart Kidd, Philip Bennett, Charles Turner].
[An alternate solution this question is the word "language." The person actually says, "Think of words ending in -gry. Hungry and angry are 2 of them. There are three words in the english language. What is the third? You use it every day. If you paid attention I have already told you the answer." More on the -gry question can be found at http://www.quinion.com/words/articles/gry.htm and at http://www.tempe.gov/library/netsites/gry.htm.]
Buckminster Fuller coined the word LIVINGRY as the opposite of weaponry, which he called KILLINGRY [Charles Turner].
On Aug. 18, 2002, the New York Times Magazine had the following sentence: “Baseball suffered the triple threat of steroids, strikes, and Seligry.” This -gry word, which is not in any dictionaries, is a play on the name of Bud Selig, the Commissioner of Baseball [Fred Shapiro]
In Dutch, there are jij (you), pijjekker (pea-jacket, although not found in dictionaries), schrooiijzer (upstanding cutting iron for bars, rods), sjiiet (follower of the Shia), snijijzer (cutting iron), uitdijing (expansion), and zijig (effeminate) [Oscar van Vlijmen, René Davids].
In Lithuanian, jiji is an archaic Lithuanian form of "him" consisting exclusively of dotted letters, and kraujijimas is archaic for "staining with blood" [Juozas Rimas].
In Swahili, jiji means "city" and kijiji means a small city or village [Gerald Gathuto].
In Hungarian, jöjjön (meaning "he should come") has seven dots in a row [Maryam Frazer].
In Finnish, pääjääjää (meaning "the main stayer," partitive case) has 14 dots in a row, according to Pertti Malo, who writes that a person at the Research Institute for the Languages of Finland "writes to me that 'in theory' she would approve this word." Malo writes that there are so many ways to create a Finnish word that it would be impossible to collect them all in a dictionary. A website (in Finnish) estimate there are 1024 Finnish words.
A property development company in the Canadian territory of Nunavut is the Katujjijiit Development Corporation, with six consecutive dotted letters [Craig Rowland].
Barry Harridge reports that in Chambers the eight spellings of CATERCORNER are surpassed by the number of variants for GALLABEA which can also be spelled gallabeah, gallabia, gallabiah, gallabieh, gallabiya, gallabiyah, gallabiyeh, galabea, galabeah, galabia, galabiah, galabieh, galabiya, galabiyah, galabiyeh. Friederike E. Droegemueller adds these spellings: Djellabah, Jellaba, Djallabea, Jalaba, Djelaba. She writes, "I saw all of these spellings, and more, in Morocco. It is, by the way, the same garment, regardless of spelling."
Eric Brahinsky has found that W3 gives ten spellings for the plural of Kirghiz (the name of an Asian people): KIRGHIZ, KIRGHIZES, KIRGHESE, KIRGHESES, KIRGHIS, KIRGHISES, KIRGIZ, KIRGIZES, KHIRGHIZ, and KHIRGHIZES. (The singular form has five spellings in W3.)
Eric Brahinsky has found that W3 gives twelve spellings for the plural of Haftarah (the singular of which has four spellings shown). The plurals are: HAFTAROTH, HAFTAROT, HAFTARAHS, HAPHTAROTH, HAPHTAROT, HAPHTARAHS, HAFTOROTH, HAFTOROT, HAFTORAHS, HAPHTOROTH, HAPHTOROT, and HAPHTORAHS.
Gloria Donen Sosin says she has found 16 spellings for HANUKKAH (in alphabetical order): Channuka, Channukah, Chanuka, Chanukah, Chanuko, Hannuka, Hannukah, Hanuka, Hanukah, Hanukkah, Kanukkah, Khannuka, Khannukah, Khanuka, Khanukah, and Khanukkah. (Her list may include transliterations from Hebrew to English.) James A. Landau has found Chanuccah in an 1872 prayer book.
The name MUAMMAR KHADAFI has 32 variants according to the Library of Congress. (1) Muammar Qaddafi, (2) Mo'ammar Gadhafi, (3) Muammar Kaddafi, (4) Muammar Qadhafi, (5) Moammar El Kadhafi, (6) Muammar Gadafi, (7) Mu'ammar al-Qadafi, (8) Moamer El Kazzafi, (9) Moamar al-Gaddafi, (10) Mu'ammar Al Qathafi, (11) Muammar Al Qathafi, (12) Mo'ammar el-Gadhafi, (13) Moamar El Kadhafi, (14) Muammar al-Qadhafi, (15) Mu'ammar al-Qadhdhafi, (16) Mu'ammar Qadafi, (17) Moamar Gaddafi, (18) Mu'ammar Qadhdhafi, (19) Muammar Khaddafi, (20) Muammar al-Khaddafi, (21) Mu'amar al-Kadafi, (22) Muammar Ghaddafy, (23) Muammar Ghadafi, (24) Muammar Ghaddafi, (25) Muamar Kaddafi, (26) Muammar Quathafi, (27) Muammar Gheddafi, (28) Muamar Al-Kaddafi, (29) Moammar Khadafy, (30) Moammar Qudhafi, (31) Mu'ammar al-Qaddafi, (32) Mulazim Awwal Mu'ammar Muhammad Abu Minyar al-Qadhafi [Charles Turner].
David Fabian performed a Google search using various spellings on Dec. 20-21, 2003, and found the following number of hits for each: Gaddafi, 60600; Gadaffi, 26800; Qaddafi, 23900; Khadafi, 18300; Gadhafi, 17600; Kadhafi, 17000; Kadafi, 14300; Qadhafi, 12900; Kaddafi, 10000; Gadafi, 6910; Ghaddafi, 4310; Khaddafi, 3920; Khadafy, 3890; Khadaffi, 2840; Ghadafi, 2550; Qadaffi, 2200; Ghadaffi, 2070; Gadafy, 1760; Kadaffi, 1490; Qadafi, 1450; Khadaffy, 1350; Gaddhafi, 897; Gaddaffi, 861; Khaddafy, 802; Gaddafy, 670; Ghadhafi, 462; Gadhaffi, 442; Qaddaffi, 381; Qaddhafi, 304; Khadhafi, 289; Kadafy, 270; Gadaffy, 245; Kaddhafi, 196; Kaddaffi, 187; Kadhaffi, 181; Kadaffy, 178; Ghaddaffi, 156; Khaddaffi, 133; Qaddafy, 129; Kaddafy, 127; Ghadafy, 121; Ghaddafy, 114; Qhadafi, 101; Qadhaffi, 98; Qadafy, 86; Qadaffy, 72; Kadhafy, 71; Khaddhafi, 60; Ghadaffy, 60; Qhaddafi, 39; Qhadaffi, 33; Khaddaffy, 29; Gadhafy, 29; Kadhaffy, 28; Gaddhaffi, 27; Gaddaffy, 24; Qhadafy, 24; Qadhafy, 24; Ghaddhafi, 20; Kaddaffy, 20; Qhaddafy, 14; Kaddhaffi, 13; Khadhaffi, 10; Ghadhaffi, 10; Qhaddaffi, 9; Gadhaffy, 8; Kaddhafy, 7; Ghaddaffy, 4; Qaddhaffi, 3; Qhadaffy, 3; Ghaddhaffi, 2; Qhadhafi, 2; Gaddhafy, 2; Qaddhafy, 2; Qadhaffy, 2; Kaddhaffy, 1; Ghadhafy, 1; Qaddaffy, 1. Other spellings may exist.
In May, 1986, when Khadafy responded to a letter from some second-graders at Maxfield Magnet School in St. Paul, Minnesota, he signed the letter in Arabic script, beneath which was typed "Moammar El-Gadhafi." This was the first known indication of his own feelings on the subject, and the wire services and many newspapers promptly announced they would switch. But Time and the New York Times remain holdouts [Charles Turner].
The longest "well-mixed" transposals (no more than three consecutive letters in common) are BASIPARACHROMATIN/MARSIPOBRANCHIATA (17 letters) and THERMONASTICALLY/HEMATOCRYSTALLIN (16 letters) [Dan Tilque].
The longest three-way well-mixed transposal is INTERROGATIVES/REINVESTIGATOR/TERGIVERSATION (14 letters) [Dan Tilque].
A 15-letter well-mixed transposal is MEGACHIROPTERAN/CINEMATOGRAPHER [Charles Turner].
The longest "perfectly mixed" transposals (no consecutive letter combinations) are NITROMAGNESITE/REGIMENTATIONS and ROTUNDIFOLIATE/TITANOFLUORIDE (both 14 letters) [Dan Tilque].
(According to Dan Tilque, the transposal definitions and results are from from Word Recreations by A. Ross Eckler, although the results were discovered mostly by members of the National Puzzler's League, without the aid of computers.)
In W3, ABC is a word, meaning “alphabet.”
Allowing intervening punctuation, there is SAB-CAT (a saboteur) in W2 and W3 [Susan Thorpe in WordsWorth].
Proper nouns include ABCOUDE (city in the Netherlands), ZABCIKVILLE (city in Texas), and ABCHASIA (a small breakaway republic on the Black Sea which is or was part of the Republic of Georgia).
There are also B. abchasica, C. abchasicum, and H. abchasicus, all three of which are botanical names for Paeonia Plants found in the Caucasus [Philip Bennett, Charles Turner].

A footnote indicates the excerpt above was based on Philip Gove, "The History of Dord," American Speech, 29 (1954): 136-8.When the guidelines for etymology in Webster's Third were nearing completion, Gove took time out to add the story of dord to the lore of how things can go wrong in dictionary making. Dord was a word that had appeared spontaneously and had found a quiet niche in the English language two decades earlier. It was recorded in Webster's Second in 1934 on page 771, where it remained undetected for five years. It disappeared from the dictionary a year later without ever having entered common parlance. The facts, which had been established years earlier through a search of company files, were as follows, as abridged from Gove's explanation.The lack of an etymology for dord, meaning "density," was noted by an editor on February 28, 1939, when he was perusing the dictionary. Startled by the omission, he went to the files to track down what had happened and what needed to be done. There, he found, first, a three-by-five white slip that had been sent to the company by a consultant in chemistry on July 31, 1931, bearing the notation "D or d, cont/ density." It was intended to be the basis for entering an additional abbreviation at the letter D in the next edition. The notation "cont," short for "continued," was to alert the typist to the fact that there would be several such entries for abbreviations at D.
A change in the organization of the dictionary possibly added to the confusion that followed. For the 1934 edition, all abbreviations were to be assembled in a separate "Abbreviations" section at the back of the book; in the previous edition words and abbreviations appeared together in a single alphabetical listing (which is how they again appeared in the Third Edition.) But after the original slip was typed for editorial handling, it was misdirected. Eventually, it came to be treated with the words rather than with the abbreviations.
Th editorial stylist who received the first typed version should have marked "or" to be set in italics to indicate that the letters were abbreviations (D or d). But instead, she drew a continuous wavy line underneath to signify that "D or d" should be set in boldface in the manner of an entry word, and a label was added, "Physics & Chem." Since entry words were to be typed with a space between letters, the editorial stylist may have inferred that the typist had intended to write d o r d; the mysterious "cont" was ignored. These errors should have been caught when the word was retyped on a different color slip for the printer, but they were not. The stylist who received this version crossed out the "cont" and added the part-of-speech label n for noun.
"As soon as someone else entered the pronunciation," Gove wrote, "dord was given the slap on the back that sent breath into its being. Whether the etymologist ever got a chance to stifle it, there is no evidence. It simply has no etymology. Thereafter, only a proofreader had final opportunity at the word, but as the proof passed under his scrutiny he was at the moment not so alert and suspicious as usual."
The last slip in the file -- added in 1939 -- was marked "plate change imperative/urgent." The entry was deleted, and the space was closed up by lengthening the entry that followed. In 1940 bound books began appearing without the ghost word but with a new abbreviation. In the list of meanings for the abbreviation "D or d" appeared the phrase "density, Physics." Probably too bad, Gove added, "for why shouldn't dord mean density?"
Some non-existent places are GOBLU and BEATOSU, which appeared as towns on the 1979-80 Michigan State Highway Commission map; they actually represented Go Blue! and Beat OSU, and were deleted from the 1980-81 map [Dickson].
lighttight and lillypilly are the longest words consisting of only long letters. Some nine-letter words are flightily, highlight, and hillbilly. The original source for these two lists included i as both a short and long letter.
gyp and gyppy (in OSW and OED2) consist only of letters with descenders.
Some words with only "up" letters are tikitiki (W2), libidibi (W2), dikdik, titbit, and tidbit. OED2 also has the obsolete biddikil and tittifill and the variant spelling hiddill.
[Mike Turniansky, Jim Cook, Stuart Kidd, Rex Gooch, and Philip Bennett contributed to the letter-size section].
Some long words consisting of only letters in the second half of the alphabet are NONSUPPORTS, PUTTYROOTS, POPPYWORTS, SYNSPOROUS, NONTORTUOUS, SOUPSPOONS, PROSUPPORT, and ZOOSPOROUS [Marc Broering, Stuart Kidd, Philip C. Bennett, Paul Wright]. Allowing proper names, there are TUTTOQQORTOOQ (13 letters, an island in Greenland) and ROSSOUWSPOORT (13 letters, the name of a pass in South Africa) [Susan Thorpe].