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Q: What exceptional words turn into other words by transposition of letters?

A:    longest well-mixed transposal
    CINEMATOGRAPHER, MEGACHIROPTERAN (15)
    CENTAUROMACHIAS, MARCHANTIACEOUS (15)
    [[[BASIPARACHROMATIN, MARSIPOBRANCHIATA (17)]]
   longest transposition list for each word length
    03: ATE,TAE,TEA,EAT,ETA (5) [[[AET]]
	EAR,ERA,AER,ARE,REA (5)
	YAR,RYA,ARY,RAY,AYR (5)
    04: RASE,SERA,REAS,EARS,ARES,ARSE,ERAS,AERS,SEAR (9) [[[RESA,ESRA]]
    05: SALET,SETAL,SLATE,TALES,STALE,STEAL,STELA,TEALS,LEATS,TESLA,LEAST,
	LATES,LAETS,TAELS,ATLES (15)
    06: STALER,SALTER,ARTELS,SLATER,ALERTS,STELAR,RATELS,TALERS,LASTER,ALTERS,
	ESTRAL,TARSEL (12) [[[RELAST,LASTRE,RESALT,RASTLE]]
	PERCAS,PACERS,CRAPES,SCARPE,SPACER,RECAPS,SCRAPE,PARSEC,CAPERS,ESCARP,
	SPARCE,SECPAR (12)
    07: RATINES,NERITAS,RETAINS,TANIERS,STARNIE,RETINAS,STEARIN,STAINER,
	RETSINA,RESIANT,ANTSIER,RESTAIN,ANESTRI,NASTIER (14) [[[ASTERIN,ERANIST]]
    08: TEARINGS,GANTRIES,ANGRIEST,ASTRINGE,GANISTER,GRANITES,TANGIERS,
	ANGRITES,INGRATES,RANGIEST (10) [[[SATINGER, SIGNATER]]
    09: TRICOSANE,CREATIONS,REACTIONS,CANOTIERS,ANORETICS,ATROSCINE,CONARITES,
	CERTOSINA (8) [[[OSTRACINE,NARCOTISE,TINOCERAS]]
    10: CRENATIONS,CONTAINERS,SANCTIONER,COTARNINES,CONNARITES,NARCOTINES (6)
	[[[RESANCTION]]
    11: CREATIONISM,REACTIONISM,MISCREATION,MARCIONITES,ANISOMETRIC (5)
	[[[ROMANTICISE,RAMISCETION]]
    12: CONSARCINATE,TRANSOCEANIC,NARCACIONTES,ANACREONTICS (4)
	ARENICOLITES,NEOREALISTIC,LECTIONARIES,RICINOLEATES (4)
    13: CRETIFICATION,CERTIFICATION,RECTIFICATION (3)
	IMPERCEPTIONS,PERCEPTIONISM,MISPERCEPTION (3)
	[[[PICTORIALISED,PROIDEALISTIC,PERIDIASTOLIC,PERIODICALIST (4)]]
    14: CERTIFICATIONS,RECTIFICATIONS,CRETIFICATIONS (3)
	BILATERALITIES,RELATABILITIES,ALTERABILITIES (3)
    15: NOMOGRAPHICALLY,MONOGRAPHICALLY,PHONOGRAMICALLY (3) [[[GRAMOPHONICALLY]]
    16: PATHOPHYSIOLOGIC,PHYSIOPATHOLOGIC (2)
	PHOTOCHRONOGRAPH,CHRONOPHOTOGRAPH (2)
	CONSERVATIONISTS,CONVERSATIONISTS (2)
	PRECHLORINATIONS,PERCHLORINATIONS (2)
	SILICOTUNGSTATES,TUNGSTOSILICATES (2)
	PHOSPHOGLYCERATE,GLYCEROPHOSPHATE (2)
	PHOTOTELEGRAPHIC,TELEPHOTOGRAPHIC (2)
	PHOSPHOMOLYBDATE,MOLYBDOPHOSPHATE (2)
	BIOPSYCHOLOGICAL,PSYCHOBIOLOGICAL (2)
	INTERNATIONALISM,INTERLAMINATIONS (2)
	RADIOPHOTOGRAPHS,PHOTORADIOGRAPHS (2)
	MACROPHOTOGRAPHY,PHOTOMACROGRAPHY (2)
	MACROPHOTOGRAPHS,PHOTOMACROGRAPHS (2)
	INTRACRYSTALLINE,INTRACISTERNALLY (2)
	ALUMINOSILICATES,SILICOALUMINATES (2)
	PETROGRAPHICALLY,PTERYLOGRAPHICAL (2)
	CHONDRODYSPLASIA,DYSCHONDROPLASIA (2)
	SACCULOUTRICULAR,UTRICULOSACCULAR (2)
	THERMOBAROGRAPHS,BAROTHERMOGRAPHS (2)
	AUTORADIOGRAPHIC,RADIOAUTOGRAPHIC (2)
    17: PHOTOFLUOROMETRIC,FLUOROPHOTOMETRIC (2)
	RETINOCHOROIDITIS,CHOROIDORETINITIS (2)
	SPECTROMICROSCOPE,MICROSPECTROSCOPE (2)
	IMPRESSIBLENESSES,PERMISSIBLENESSES (2)
	PHOSPHOTUNGSTATES,TUNGSTOPHOSPHATES (2)
	PHYSIOPATHOLOGIES,PATHOPHYSIOLOGIES (2)
	MISREPRESENTATION,REPRESENTATIONISM (2)
	PYELOURETEROGRAMS,URETEROPYELOGRAMS (2)
	PHOTOTELEGRAPHIES,TELEPHOTOGRAPHIES (2)
	PNEUMOHYDROTHORAX,HYDROPNEUMOTHORAX (2)
	CHRONOPHOTOGRAPHY,PHOTOCHRONOGRAPHY (2)
	PHOTOCHRONOGRAPHS,CHRONOPHOTOGRAPHS (2)
	PHOSPHOGLYCERATES,GLYCEROPHOSPHATES (2)
	PHOTOMICROGRAPHED,MICROPHOTOGRAPHED (2)
	MICROPHOTOGRAPHIC,PHOTOMICROGRAPHIC (2)
	MOLYBDOPHOSPHATES,PHOSPHOMOLYBDATES (2)
	CHONDRODYSPLASIAS,DYSCHONDROPLASIAS (2)
	AUTORADIOGRAPHIES,RADIOAUTOGRAPHIES (2)
    18: PSYCHOPHYSIOLOGIES,PHYSIOPSYCHOLOGIES (2)
	REPRESENTATIONISMS,MISREPRESENTATIONS (2)
	PHOTOMICROGRAPHING,MICROPHOTOGRAPHING (2)
	PHOTOMICROGRAPHIES,MICROPHOTOGRAPHIES (2)
	SOCIOPSYCHOLOGICAL,PSYCHOSOCIOLOGICAL (2)
	HEXAKISTETRAHEDRON,TETRAKISHEXAHEDRON (2)
	PATHOPHYSIOLOGICAL,PHYSIOPATHOLOGICAL (2)
	MACROPHOTOGRAPHIES,PHOTOMACROGRAPHIES (2)
    19: RETINOCHOROIDITISES,CHOROIDORETINITISES (2)
	PNEUMOHYDROTHORAXES,HYDROPNEUMOTHORAXES (2)
	PHOTOCHRONOGRAPHIES,CHRONOPHOTOGRAPHIES (2)
	MENINGOENCEPHALITIS,ENCEPHALOMENINGITIS (2)
	PHYSIOPSYCHOLOGICAL,PSYCHOPHYSIOLOGICAL (2)
	CORTICOADRENOTROPIC,ADRENOCORTICOTROPIC (2)
	TETRAKISHEXAHEDRONS,HEXAKISTETRAHEDRONS (2)
	TRANSUBSTANTIATIONS,TRANSSUBSTANTIATION (2)
    21: ENCEPHALOMENINGITISES,MENINGOENCEPHALITISES (2)
    27: HYDROXYDEOXYCORTICOSTERONES,HYDROXYDESOXYCORTICOSTERONE (2)
   longest letter exchange PERCHLORINATIONS,PRECHLORINATIONS (16)
    for each letter
    13 : ACCOUTERMENTS,ACCOUTREMENTS
    13 : ALTITUDINALLY,LATITUDINALLY
    11 : BUFFELHEADS,BUFFLEHEADS
    15 : CONCESSIONAIRES,CONCESSIONARIES
    14 : DISCREETNESSES,DISCRETENESSES
    12 : EDIFICATIONS,DEIFICATIONS
    11 : ECTOMORPHIC,CETOMORPHIC
    13 : FORWARDNESSES,FROWARDNESSES
    13 : FUNCTIONAIRES,FUNCTIONARIES
    11 : GUSTINESSES,GUTSINESSES
    10 : GEOCENTRIC,EGOCENTRIC
    12 : HYPOCHONDERS,HYPOCHONDRES
    13 : INSATURATIONS,INSTAURATIONS
    07 : JAEGERS,JAGEERS
    09 : KAOLIANGS,KOALIANGS
    08 : KASTURAS,KATSURAS
    11 : LALOPATHIES,ALLOPATHIES
    11 : LATERNARIAS,ALTERNARIAS
    12 : MILLIONAIRES,MILLIONARIES
    12 : NEOGENESISES,NOEGENESISES
    11 : NEARTHROSIS,ENARTHROSIS
    11 : NIDOLOGISTS,INDOLOGISTS
    11 : NONENTRESES,NONENTRESSE
    12 : ORTHOCENTERS,ORTHOCENTRES
    11 : OPINIASTERS,OPINIASTRES
    10 : OCTILLIONS,COTILLIONS
    10 : OPTOMETERS,POTOMETERS
    16 : PERCHLORINATIONS,PRECHLORINATIONS
    14 : PARADISAICALLY,PARADISIACALLY
    14 : PERVIOUSNESSES,PREVIOUSNESSES
    14 : PETROGRAPHICAL,PTEROGRAPHICAL
    13 : QUESTIONAIRES,QUESTIONARIES
    12 : RECONNOITERS,RECONNOITRES
    11 : REPERTOIRES,REPERTORIES
    14 : SACRIFICATIONS,SCARIFICATIONS
    12 : TENUIROSTERS,TENUIROSTRES
    09 : TOLOACHES,TOOLACHES
    08 : THICKEST,THICKSET,THICKETS
    11 : USABILITIES,SUABILITIES
    10 : UNTHATCHES,NUTHATCHES
    10 : URINATIONS,RUINATIONS
    07 : VAILING,AVILING
    07 : VERSETS,VERSTES
    10 : WARRANTIES,WARRANTISE
    06 : YAREST,AYREST
    05 : YAKAS,YAKSA
    05 : YELMS,YLEMS
    07 : ZAFFERS,ZAFFRES
    05 : ZAMAN,NAMAZ
    05 : ZORRA,ARROZ
    04 : ZEUS,SUEZ
    04 : ZIWS,SWIZ
    most words in list
    4 : ARUAS,AURAS,ARAUS,ARUSA
    4 : BAED,ABED,BEAD,BADE
    4 : BALAS,BLAAS,BAALS,BALSA
    4 : BALE,ABLE,BLAE,BAEL
    4 : GORES,OGRES,GOERS,GORSE
    4 : LIAS,ILAS,LAIS,LISA
    4 : MAIS,AMIS,MIAS,MASI
    4 : MARAS,AMRAS,MAARS,MARSA
    4 : NAIS,ANIS,NIAS,NASI
    4 : RUES,URES,REUS,RUSE
    4 : VIAS,IVAS,VAIS,VISA
   longest reversal  DESSERTS,STRESSED (8)
    for each letter
    7 : AMAROID,DIORAMA
    6 : BRUTED,DETURB
    5 : CABOB,BOBAC
    5 : CABOT,TOBAC
    5 : CAMUS,SUMAC
    5 : CANAL,LANAC
    5 : CARES,SERAC
    5 : CIRES,SERIC
    8 : DESSERTS,STRESSED
    7 : DENOTES,SETONED
    6 : ECITON,NOTICE
    6 : ELIDES,SEDILE
    6 : ELUTES,SETULE
    6 : EVILER,RELIVE
    5 : FIRES,SERIF
    6 : GANGAN,NAGNAG
    6 : HALLAN,NALLAH
    5 : ILLUK,KULLI
    5 : IZBAS,SABZI
    5 : JAMAS,SAMAJ
    5 : KAMIA,AIMAK
    5 : KAYAN,NAYAK
    5 : KEELS,SLEEK
    5 : KEETS,STEEK
    5 : KITAB,BATIK
    5 : KITHS,SHTIK
    5 : KNAPS,SPANK
    5 : KNITS,STINK
    5 : KNOTS,STONK
    5 : KNUTS,STUNK
    5 : KORAT,TAROK
    5 : KRANS,SNARK
    6 : LAKOTA,ATOKAL
    6 : LAMINA,ANIMAL
    6 : LEMMAS,SAMMEL
    6 : LEVINS,SNIVEL
    6 : LOOTER,RETOOL
    6 : MUILLA,ALLIUM
    6 : NAILED,DELIAN
    6 : NAVARS,SRAVAN
    6 : NEDDER,REDDEN
    6 : NIMROD,DORMIN
    6 : NIZIES,SEIZIN
    6 : OTUSES,SESUTO
    6 : PUPILS,SLIPUP
    8 : REDRAWER,REWARDER
    7 : SAGENES,SENEGAS
    7 : SETOVER,REVOTES
    7 : STINKER,REKNITS
    7 : TRESSED,DESSERT
    4 : UKUS,SUKU
    4 : ULUA,AULU
    4 : ULUS,SULU
    4 : URUK,KURU
    4 : USUS,SUSU
    4 : UTIA,AITU
    4 : VALS,SLAV
    7 : WAH-WAH,HAW-HAW
    6 : WARDER,REDRAW
    6 : WOLFER,REFLOW
    5 : WARTS,STRAW
    5 : WORTS,STROW
    4 : YAHS,SHAY
    4 : YAOS,SOAY
    4 : YAPS,SPAY
    4 : YARD,DRAY
    4 : YAWS,SWAY
    5 : ZAMAN,NAMAZ
    5 : ZORRA,ARROZ
  transposition with deletion, insertion, or substitution
   longest well-mixed transdeletion
    SONOLUMINESCENCES, UNECONOMICALNESSES (17/18)
   longest word transdeletable to a single letter
    CONCENTRATIONS-CONSTERNATION-CONTORNIATES-TRANSECTION-
    STENTORIAN-TRANSIENT-ENTRAINS-NASTIER-ASTERN-TEARS-SATE-TEA-AT-A (14)
   longest Baltimore transdeletion (word transdeletable on every letter)
     IDOLATERS: DELATORS, SOTERIAL, DILATERS, ASTEROID,
    STOLIDER, SOREDIAL, DILATORS, DIASTOLE, TAILORED  (9)
   shortest word that cannot be transadded to another word  SYZYGY (6)
   longest well-mixed transubstitution
    MICROELECTROPHORESIS, SPECTROCOLORIMETRIES (20)
''''''''''''
All unbracketed words occur in Webster's Third New International Dictionary,
Merriam-Webster, Springfield, MA, 1961.
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