There are 462 thirteen-letter words containing A, D, E and H, https://www.bestwordlist.com/c/a/4/13letterwordswithadeh.htm
ACETALDEHYDES ACIDOPHILUSES ADIATHERMANCY ADMONISHMENTS ADRENOCHROMES
AESTHETICISED AESTHETICIZED ALDERMANSHIPS AMPHIPLOIDIES ANAESTHETISED
ANAESTHETIZED ANATHEMATISED ANATHEMATIZED ANDROSPHINGES ANDROSPHINXES
ANTHEROZOOIDS ANTIAPARTHEID ANTIDIARRHEAL ANTIHYDROGENS APOSTROPHISED
APOSTROPHIZED ARCHDUCHESSES ARCHIMANDRITE ASHAMEDNESSES AUTHENTICATED
AUTOSCHEDIASM AUTOSCHEDIAZE BACHELORHOODS BACKSCRATCHED BENZALDEHYDES
BIGHEADEDNESS BLANDISHMENTS BLOCKHEADEDLY BOARDINGHOUSE BODYSNATCHERS
BRAINCHILDREN BREECHLOADERS BROKENHEARTED BUTYRALDEHYDE CADDISHNESSES
CANDIDATESHIP CANDLEHOLDERS CANDLELIGHTED CANDLELIGHTER CARBOHYDRASES
CARBOHYDRATES CARDIOGRAPHER CARDIOPATHIES CATHIODERMIES CEPHALOPODANS
CEPHALOPODOUS CEPHALORIDINE CHALCEDONYXES CHALCOGENIDES CHANGEAROUNDS
CHARACTERISED CHARACTERIZED CHATEAUBRIAND CHECKERBOARDS CHEQUERBOARDS
CHICKABIDDIES CHILDBEARINGS CHILDRENSWEAR CHILIAHEDRONS CHIMNEYBOARDS
CHLAMYDOSPORE CHONDROSAMINE CHOREOGRAPHED CHOWDERHEADED CHUCKLEHEADED
CHURCHWARDENS CLEARHEADEDLY COACHBUILDERS COLDHEARTEDLY COMMANDERSHIP
CREATUREHOODS CYBERCHONDRIA DAMPISHNESSES DAUGHTERBOARD DAUGHTERHOODS
DAUGHTERLIEST DAUGHTERLINGS DEATHLESSNESS DEATHLINESSES DEBAUCHEDNESS
DECAMETHONIUM DECHLORINATED DECHLORINATES DEHYDROGENASE DEHYDROGENATE
DEMETHYLATING DEMETHYLATION DEMOGRAPHICAL DEMOGRAPHISTS DEPHLEGMATING
DEPHLEGMATION DEPHLEGMATORS DERMATOGRAPHY DERMATOPHYTES DERMATOPHYTIC
DERMOGRAPHIES DESULPHURATED DESULPHURATES DETACHABILITY DEXAMETHASONE
DIAPHANEITIES DIAPHANOMETER DIATHERMACIES DIATHERMANOUS DIAZOMETHANES
DIBRANCHIATES DICHLAMYDEOUS DICHLORACETIC DIEFFENBACHIA DIENCEPHALONS
DIETHYLAMIDES DIETHYLAMINES DILETTANTEISH DIMETHYLAMINE DIOTHELETICAL
DIPHENYLAMINE DISACCHARIDES DISAUTHORISED DISAUTHORISES DISAUTHORIZED
DISAUTHORIZES DISCHARGEABLE DISCOGRAPHERS DISCOGRAPHIES DISENCHAINING
DISENCHANTERS DISENCHANTING DISENTHRALLED DISFRANCHISED DISFRANCHISES
DISHABILITATE DISHARMONISED DISHARMONISES DISHARMONIZED DISHARMONIZES
DISHEARTENING DISHONOURABLE DISINTHRALLED DITTOGRAPHIES DODECAHEDRONS
DODECAPHONIES DODECAPHONISM DODECAPHONIST DOLICHOCEPHAL DOUBLEHEADERS
DOWNHEARTEDLY DRAUGHTSWOMEN DUNDERHEADISM DYOTHELETICAL DYOTHELITICAL
DYSAESTHESIAS DYSMENORRHEAL DYSMENORRHEAS DYSMENORRHOEA EGGHEADEDNESS
ENCHONDROMATA ENDOLYMPHATIC ENDOTHELIOMAS ENTERCHAUNGED ESOPHAGITIDES
EXHEREDATIONS FADDISHNESSES FATHEADEDNESS FEATHERBEDDED FEATHEREDGING
FEATHERHEADED FELDSPATHOIDS FINGERBREADTH FOOLHARDINESS FORESHADOWERS
FORESHADOWING FORMALDEHYDES FOUNTAINHEADS FREEHEARTEDLY GENTLEMANHOOD
GILLRAVITCHED GRADUATESHIPS GRANDCHILDREN GRANDDAUGHTER GRANDFATHERED
GRANDFATHERLY GRANDMOTHERLY GUANETHIDINES HADROSAURUSES HAEMODIALYSER
HAEMODIALYSES HAEMODIALYSIS HAEMODIALYZER HAEMODILUTION HAEMODYNAMICS
HAEMOPHILIOID HAEMORRHOIDAL HAEMOSIDERINS HAGGARDNESSES HAIRDRESSINGS
HAIRSBREADTHS HALFHEARTEDLY HANDCRAFTSMEN HANDICRAFTERS HANDKERCHIEFS
HANDSBREADTHS HAPHAZARDNESS HAPHAZARDRIES HARDHEARTEDLY HARDSCRABBLES
HARLEQUINADES HAUSSMANNISED HAUSSMANNIZED HAZARDOUSNESS HEADMISTRESSY
HEADQUARTERED HEADSHRINKERS HEBDOMADARIES HEMICHORDATES HEMODIALYZERS
HEMORRHOIDALS HENCEFORWARDS HENDECAHEDRON HEPTADECANOIC HEREDITAMENTS
HEREDITARIANS HERMAPHRODITE HETERODACTYLS HEXACHLORIDES HEXACTINELLID
HEXADACTYLOUS HEXAFLUORIDES HEXAGRAMMOIDS HISPANIOLISED HISPANIOLIZED
HOCHMAGANDIES HOLIDAYMAKERS HOMESTEADINGS HOMOSCEDASTIC HORSERADISHES
HOTHEADEDNESS HOUGHMAGANDIE HOUSEHUSBANDS HUMBLEBRAGGED HYALURONIDASE
HYDNOCARPATES HYDRARTHROSES HYDRASTININES HYDROCEPHALIC HYDROCEPHALUS
HYDROCRACKERS HYDROGENATING HYDROGENATION HYDROGENATORS HYDROGRAPHERS
HYDROGRAPHIES HYDROMAGNETIC HYDROMASSAGES HYDROMEDUSANS HYDROMETRICAL
HYDROSULPHATE HYDROTHERAPIC HYDROTHORACES HYDROTHORAXES HYDROXYACETIC
HYDROXYLAMINE HYPERBOLOIDAL HYPERINFLATED HYPOACIDITIES HYPOSPADIASES
IDEOGRAPHICAL IMPOSTHUMATED INDOMETHACINS INTERWREATHED KALEIDOPHONES
KINDHEARTEDLY KNUCKLEHEADED LADDISHNESSES LAMPADEPHORIA LANDOWNERSHIP
LOATHEDNESSES LYMPHADENITIS LYMPHOADENOMA MACHINEGUNNED MAIDISHNESSES
MEDIATORSHIPS MERCHANDISERS MERCHANDISING MERCHANDIZERS MERCHANDIZING
METAMORPHOSED METHODISATION METHODIZATION MISAPPREHENDS MISCHANNELLED
MISEMPHASISED MISEMPHASIZED MITHRIDATISED MITHRIDATISES MITHRIDATIZED
MITHRIDATIZES MODERATORSHIP MONODELPHIANS MULTIAUTHORED MULTIBRANCHED
MULTIWARHEADS NEANDERTHALER NEARSIGHTEDLY NONDETACHABLE NONHEREDITARY
NORTHEASTWARD NORTHWESTWARD OFFHANDEDNESS OPENHEARTEDLY ORTHOPAEDICAL
ORTHOPAEDISTS OVERHARVESTED OVERSHADOWING OVERWEATHERED PAEDOMORPHISM
PAEDOPHILIACS PAEDOTROPHIES PAMPHLETEERED PARAHYDROGENS PARASPHENOIDS
PARCHEDNESSES PARCHMENTISED PARCHMENTIZED PARENTHESISED PARENTHESIZED
PAROCHIALISED PAROCHIALIZED PEBBLEDASHING PENDRAGONSHIP PENTADELPHOUS
PENTAHYDRATES PERICHONDRIAL PHARYNGITIDES PHILANDERINGS PHOTOCATHODES
PHOTOENGRAVED PHYTONADIONES PIGHEADEDNESS PINHEADEDNESS POLYADELPHOUS
POSTAPARTHEID PREADMONISHED PREADMONISHES PREADULTHOODS PREAUTHORIZED
PROCATHEDRALS PROTOCHORDATE PSEUDEPIGRAPH PSYCHOBABBLED QUADRAPHONIES
QUADROPHONIES RADIESTHESIAS RADIESTHESIST RADIOCHEMICAL RADIOCHEMISTS
RADIOGRAPHERS RADIOGRAPHIES RADIOTHERMIES REESTABLISHED REHABILITATED
REPREHENDABLE RHABDOMANCERS RHABDOMANCIES RHABDOSPHERES RHABDOVIRUSES
RHADAMANTHINE RHODOMONTADED RHODOMONTADES ROADWORTHIEST SCALENOHEDRON
SCHADENFREUDE SCRIMSHANDERS SCRIMSHANDIED SCRIMSHANDIES SEMIDETACHEDS
SHADOWINESSES SHAGGEDNESSES SHAREHOLDINGS SHUFFLEBOARDS SLAVEHOLDINGS
SLEDGEHAMMERS SOFTHEARTEDLY SOPHISTICATED SOUTHEASTWARD SOUTHWESTWARD
SPAGHETTIFIED SPATTERDASHES SPINDLESHANKS STADHOLDERATE STAKEHOLDINGS
STAPHYLINIDAE STEEPLECHASED STEPDAUGHTERS STEREOGRAPHED STICKHANDLERS
STRAIGHTBREDS STRAIGHTEDGED STRAIGHTEDGES STRAIGHTLACED STRANGLEHOLDS
STROPHIOLATED SUBDEACONSHIP SULPHADIAZINE SULPHADOXINES SULPHONAMIDES
SUPERHARDENED SYCOPHANTISED SYCOPHANTIZED SYNADELPHITES SYNECDOCHICAL
TECHNICALISED TECHNICALIZED TENDERHEARTED TETARTOHEDRAL TETRACHLORIDE
TETRADRACHMAS TETRADRACHMON TETRAHEDRALLY TETRAHEDRITES THENCEFORWARD
THERMODYNAMIC THERMOSTATTED THIABENDAZOLE THIOCARBAMIDE THIORIDAZINES
THOROUGHPACED THREADINESSES TRAPEZOHEDRAL TRAPEZOHEDRON TRIMETHADIONE
TRISACCHARIDE TRISOCTAHEDRA UNAPPREHENDED UNASHAMEDNESS UNCHLORINATED
UNCHRISTIANED UNDERACHIEVED UNDERACHIEVER UNDERACHIEVES UNDERCHARGING
UNDEREMPHASES UNDEREMPHASIS UNDERHANDEDLY UNESTABLISHED UNHANDINESSES
UNTHRIFTIHEAD UNTHRIFTYHEAD VIDEOGRAPHERS VIDEOGRAPHIES WEATHERBOARDS
WEATHERCOCKED WHEELBARROWED WHISKERANDOED WITHDRAWMENTS WITHDRAWNNESS
WRONGHEADEDLY ZANTEDESCHIAS