What are the word records for identical letters?

[ Editor: from the Taxonomy of Wordplay, www.questrel.com, retrieved 28 Oct 2026. Classes (common, uncommon, hyphenated words, phrases), scores, ties (-t) and the source codes in brackets are explained in language/english/word.records.introduction. ]

a.  pairs
        i.  consecutive doubled letters, containing most [L166,1-152,218,4-180]
                common word: bookkeeper (3)
        ii. doubled letters, containing most
                common words: subcommittee, possessiveness, immunosuppression, commonness, appellee, oppressiveness, barrenness, immunosuppressant, speechlessness, effortlessness, addressee, aggressiveness, bookkeeper, committee, greenness, heedlessness, heelless, keenness, needlessness, ... and 27 others (3-t)
                uncommon words: possessionlessness, successlessness (4-t)
                phrase: committee on committees (6)
        iii. for each letter, shortest
        iv.  two pairs, all 351 possible [6-17,83,10-246,16-156]
        v.  five letter words, all 260 possible [12-56,93,151]
b.  starts and ends with the same letter
        i. longest
                common word: straightforwardnesses (21)
                uncommon word: supercalifragilisticexpialidocious (34)
        ii. for each letter, longest
                see list "Longest Word that Starts and Ends with Each Letter" below
        iii. for each letter, shortest
                see list "Shortest Word that Starts and Ends with Each Letter" below
c.  tripled letter, shortest [L297,2-191,5-7,14-151,154,217,15-16,104,154,16-157]
        uncommon word: zzz (3)
d.  quadruples [L297,2-53,3-147,180,5-8,23,12-91,14-90,15-18,84,19-4]
e.  quintuples [1-31,3-252,4-144,5-8,12-91,17-26]
f.  repeats of any one letter [5-23,7-6]
        i.  most
                common word: senselessnesses (7)
                uncommon words: floccinaucinihilipilification, humuhumunukunukuapuaa, possessionlessnesses (9-t)
                phrase: between the devil and the deep blue sea (10)
                hyphenated phrase: wadi al-arabah, wadi arabah, wadi el-arabah (13)
        ii.  most for each letter
                see list "Word Containing the Most Repeats of Each Letter" below
        iii.  ratio repeats to length, highest, for each letter
                see list "Word with the Highest Ratio Letter Repeats to Length for Each Letter" below

Longest Word that Starts and Ends with Each Letter
--------------------------------------------------
a        common word: adenocarcinoma (14)
        uncommon word: abetalipoproteinemia (20)
        hyphenated word: alpha-naphthylthiourea (21)
b        common word: backstab (8)
        uncommon word: breadcrumb (10)
c        common words: carcinoembryonic, crystallographic, chemotherapeutic (16-t)
         ERROR: chrysanthemummonocarboxylic
d        common word: decontextualized (16)
        uncommon words: deinstitutionalized, deuterochloroformed (19-t)
e        common word: extraordinaire (14)
        uncommon word: ethylenediaminetetraacetate (27)
f        common word: flameproof (10)
        uncommon word: feedingstuff (12)
g        common words: groundbreaking, gerrymandering, grandfathering (14-t)
        uncommon word: gravitochemicaling (18)
h        common words: houndstooth, horseradish (11-t)
        uncommon word: hysterosalpingograph (20)
i        common word: illuminati (10)
        uncommon words: ichthyocephali, improvisatrici (14-t)
j        ?
k        common word: knickknack (10)
        uncommon word: killickinnick (13)
l        common word: lexicographical (15)
        uncommon word: litiscontestational (19)
m        common word: multiculturalism (16)
        uncommon word: magnetoencephalogram (20)
n        common word: nondiscrimination (17)
        uncommon word: nonindustrialization (20)
o        common word: obbligato (9)
        uncommon word: overbravado (11)
p        common word: proprietorship (14)
        uncommon word: primogenitureship (17)
q        uncommon word: qaraqalpaq (10)
r        common words: reflectometer, rehabilitator, restauranteur (13-t)
        uncommon words: radiobroadcaster, reindustrializer (16-t)
        hyphenated word: refrigerator-freezer (19)
s        common word: straightforwardnesses (21)
        uncommon word: supercalifragilisticexpialidocious (34)
t        common word: traditionalist (14)
        uncommon word: transubstantiationalist (23)
u        uncommon word: ushabtiu (8)
v        uncommon words: viv, vav, vov (3-t)
w        common word: wheelbarrow (11)
        hyphenated word: winter-fallow (12)
x        common word: xerox (5)
y        common word: youthfully (10)
        uncommon word: yieldability (12)
z        uncommon word: zizz (4)

Shortest Word that Starts and Ends with Each Letter
---------------------------------------------------
a        common word: aha (3)
        uncommon word: aa (2)
b        common words: bib, bob (3-t)
        uncommon word: bb (2)
c        common word: chic (4)
d        common words: dad, did, dud (3-t)
        phrase: DD (2)
e        common words: eke, ere, eve, ewe, eye (3-t)
        uncommon word: ee (2)
f        common word: fief (4)
        phrase: FF (2)
g        common words: gag, gig (3-t)
        phrase: GG (2)
h        common words: hash, high, hush (4-t)
        uncommon words: huh, heh, hah, hoh (3-t)
i        common words: indri, issei (5-t)
        uncommon words: ici, ihi (3-t)
        phrase: II (2)
j        ?
k        common words: kick, kink (4-t)
        uncommon word: kok (3)
l        common word: ll (2)
m        common words: mom, mum (3-t)
        uncommon word: mm (2)
n        common word: nun (3)
        phrase: NN (2)
o        common word: onto (4)
        uncommon word: oo (2)
p        common words: pep, pip, pop, pup (3-t)
        uncommon word: pp (2)
q        uncommon word: qazaq (5)
r        common words: rear, roar (4-t)
        phrase: RR (2)
s        common word: ss (2)
t        common words: tit, tot (3-t)
        phrase: Tt (2)
u        uncommon words: utu, ulu, uku (3-t)
v        uncommon words: viv, vav, vov (3-t)
w        common word: whew (4)
        uncommon words: wow, waw (3-t)
x        common word: xerox (5)
        uncommon word: xx (2)
y        common words: yummy, yucky, yukky (5-t)
        uncommon word: yay (3)
z        uncommon words: zzz, zuz, ziz (3-t)

Word Containing the Most Repeats of Each Letter
-----------------------------------------------
a        common word: abracadabra (5)
        uncommon words: taramasalata, astragalocalcaneal, calcaneoastragalar, palaeacanthocephala, tathagatagarbha (6-t)
        phrases: anathema maranatha, australian sarsaparilla, jamaica sarsaparilla, sierra nevada de santa marta, ... and 4 others (7-t)
        hyphenated phrase: wadi al-arabah, wadi arabah, wadi el-arabah (13)
b        common words: bubbly, bubblegum, psychobabble, technobabble, bobbin, bobble, backstabbed, hobnobbing, blubbery, absorbable, baobab, blabbermouth, babble, blabbed, blubber, bobbed, bobby, bubble, bumblebee, ... and 31 others (3-t)
        uncommon words: flibbertigibbet, beblubbered, becobwebbed, bubbybush, flibbertigibbety (4-t)
        hyphenated word: bibble-babble (6)
c        common words: cryptococcal, concupiscence (4-t)
        uncommon words: chroococcaceae, chroococcaceous, circumcrescence, echinococcic, micrococcaceae, micrococcic (5-t)
d        common words: diddled, granddaddy, muddleheaded (4-t)
        uncommon word: dunderheadededness (5)
        hyphenated word: diddle-daddled (7)
e        common words: underrepresented, teleconference, overrepresented, beekeeper, interdependencies, peacekeeper, reemergence, gedankenexperiment, effervescence, representativeness, reengineered, greenskeeper, overengineered, agreeablenesses, apprehensivenesses, comprehensivenesses, deliberatenesses, desperatenesses, disinterestednesses, ... and 21 others (5-t)
        uncommon word: ethylenediaminetetraacetate (7)
        phrase: between the devil and the deep blue sea (10)
f        common word: riffraff (4)
        hyphenated word: fluffy-ruffle (5)
g        common words: gigging, aggregating, gagging, giggling, goggling, wigwagging, zigzagging (4-t)
        uncommon word: huggermuggering (5)
        hyphenated word: wagger-pagger-bagger (6)
h        common words: photolithography, hyperthermophilic, hashish, highlight, hitchhike (3-t)
        uncommon words: rhamphorhynchus, dichlorodiphenyltrichloroethane, dinaphthothiophene, hypothalamicohypophyseal, ichthyophthiriasis, ichthyophthirius, rhamphorhynchid, rhamphorhynchoid, ... and 5 others (4-t)
        phrases: hold with the hare and run with the hounds, run with the hare and hunt with the hounds (7-t)
i        common words: indistinguishability, indivisibility, ineligibilities, invincibilities, invisibilities (6-t)
        uncommon word: floccinaucinihilipilification (9)
j        common words: jujutsu, jujitsu, jejune (2-t)
        uncommon word: jejunojejunostomy (4)
k        common word: knickknack (4)
l        common words: colloquially, multicellular, allegorically, lollapalooza, ballistically, villanelle, legalistically, elliptically, dillydally, hillbilly, illegally, illogically, intellectually, skillfully, unskillfully, volleyball, willfully, ... and 3 others (4-t)
        uncommon words: polysyllabically, lillypilly, allochlorophyll, alloplastically, hyperpolysyllabically, intellectualistically, paleolimnologically (5-t)
        phrases: all hell is let loose, all's well that ends well (6-t)
m        common words: mammogram, immunocompromised (4-t)
        phrase: maximum and minimum thermometer (8)
n        common words: nondenominational, nonfunctioning, nonintervention, inconveniencing (5-t)
        hyphenated words: non-insulin-dependent, nonny-nonny (6-t)
        phrase: noncondensing engine (7)
o        common word: chlorofluorocarbon (5)
        uncommon words: hydrochlorofluorocarbon, pseudomonocotyledonous, monogonoporous (6-t)
        phrase: don't halloo till you're out of the wood (8)
p        common word: whippersnapper (4)
        hyphenated word: pip-pip-pip (6)
q        common words: quoque, equivoque (2-t)
        uncommon word: qaraqalpaq (3)
r        common words: extraterrestrial, extraterritorial, counterterrorism, extraterritoriality, extracurricular, refrigerator (4-t)
        uncommon words: ferriprotoporphyrin, ferroprotoporphyrin (5-t)
        hyphenated words: refrigerator-freezer, strawberry-raspberry (6-t)
        hyphenated phrase: reverse-current circuit breaker (7)
s        common word: senselessnesses (7)
        uncommon word: possessionlessnesses (9)
t        common words: constitutionality, transubstantiation, institutionalization, statuette, scuttlebutt, phototypesetter, unconstitutionality, deinstitutionalization, attestation, tattooist, attractant, extraterritoriality, constitutionalist, substitutability, intertextuality, intermittent, tattletale, ... and 5 others (4-t)
        uncommon words: ethylenediaminetetraacetate, teetertotter, tetrasubstituted, anticonstitutionalist, hastatosagittate, intersubstitutability, throttlebottom, totipotentiality, transubstantiationalist, ... and 9 others (5-t)
        hyphenated words: tat-tat-tat, testament-testamentar, tittle-tattle, ... and 4 others (6-t)
        phrases: pentaerythritol tetranitrate, throw out the baby with the bathwater, throw the baby out with the bath water (7-t)
u        common words: unscrupulousness, tumultuous, unscrupulous (4-t)
        uncommon word: humuhumunukunukuapuaa (9)
v        common words: innovative, overview, pervasive, investigative, overdrive, subversive, savvy, preventative, evasive, divisive, invective, invasive, evocative, survivability, survivable, uninvolved, devolve, overactive, divisiveness, ... and 81 others (2-t)
        uncommon words: overconservative, ovoviviparous, overvivid, overinvolve, vulvovaginal, ovoviviparism, ovoviviparousness, velvetleaves, vivisective, ... and 9 others (3-t)
        phrases: dum vivimus vivamus, dum vivimus, vivamus (4-t)
w        common word: powwow (3)
        hyphenated word: wow-wow (4)
x        common words: xerox, exotoxin (2-t)
        uncommon word: hexahydroxycyclohexane (3)
y        common words: polygyny, synonymously, syzygy, synonymy, psychophysiology, polydactyly (3-t)
        uncommon words: polyhydroxybutyrate, hyperpolysyllabically (4-t)
z        common word: pizzazz (4)

Word with the Highest Ratio Letter Repeats to Length for Each Letter
--------------------------------------------------------------------
a        common words: aha, baa (0.66-t)
        uncommon word: aa (1)
b        common words: bib, bob, ebb (0.66-t)
        uncommon word: bb (1)
c        common word: cocci (0.6)
        uncommon word: coccic (0.66)
d        common words: add, dad, did, dud, odd (0.66-t)
        uncommon word: dodd (0.75)
        phrases: DD, DDD (1-t)
e        common words: teepee, bee, eel, eke, ere, eve, ewe, eye, fee, gee, lee, nee, peewee, see, tee, wee (0.66-t)
        uncommon word: ee (1)
f        common word: off (0.66)
        uncommon words: faff, fuff (0.75-t)
        phrase: FF (1)
g        common words: egg, gag, gig (0.66-t)
        phrase: GG (1)
h        common words: ah, ha, hash, he, hi, high, ho, hs, hush, oh (0.5-t)
        uncommon words: huh, heh, hah, ahh, shh, hoh (0.66-t)
i        common words: bikini, initio, simili, iritis, fi, hi, ibis, if, il, im, in, ir, iris, is, it, kiwi, mi, pi, ti (0.5-t)
        uncommon word: iiwi (0.75)
        phrases: II, III (1-t)
j        common word: js (0.5)
k        common words: kick, kink, ks (0.5-t)
        uncommon words: kok, kakkak (0.66-t)
        phrase: KKK (1)
l        common word: ll (1)
m        common words: mom, mum (0.66-t)
        uncommon word: mm (1)
n        common words: inn, nun (0.66-t)
        phrase: NN (1)
o        common words: voodoo, hoodoo, boo, coo, moo, too, woo, zoo (0.66-t)
        uncommon word: oo (1)
p        common words: pep, pip, pop, pup (0.66-t)
        uncommon word: pp (1)
q        common word: qs (0.5)
r        common word: err (0.66)
        uncommon word: brrr (0.75)
        phrase: RR (1)
s        common word: ss (1)
t        common words: tit, tot (0.66-t)
        uncommon word: tatt (0.75)
        phrase: Tt (1)
u        common words: up, us (0.5-t)
        uncommon words: utu, ulu, muumuu, uku (0.66-t)
v        common words: ve, vs (0.5-t)
        uncommon words: viv, vav, vov (0.66-t)
w        common words: powwow, we, whew, ws (0.5-t)
        uncommon words: wow, waw (0.66-t)
x        common words: ax, ox, xs (0.5-t)
        uncommon word: xx (1)
y        common words: syzygy, by, ey, my, ye, yo, ys (0.5-t)
        uncommon word: yay (0.66)
z        common word: pizzazz (0.57)
        uncommon word: zzz (1)

-- Taxonomy of Wordplay, www.questrel.com