16 letters
- desexualizations36
- destabilizations31
- desulfurizations33
- detribalizations31
- devitrifications28
- diagonalizations31
- diagrammatically32
- dichotomizations35
- differentiations25
- dimensionalities23
- diminutivenesses27
- diphthongization37
- directionalities22
- disarticulations23
- disciplinarities25
- discombobulating34
- discombobulation32
- discontinuations24
- discriminatingly30
- discriminational26
- disequilibrating34
- disequilibration32
- disintoxications29
- disorganizations30
- dispensabilities25
- disproportionate24
- disproportioning27
- disputatiousness23
- disqualification35
- disruptivenesses26
- dissatisfactions24
- dissociabilities24
- distensibilities22
- distributivities25
- diversifications28
- diverticulitises26
- dogmaticalnesses27
- ecclesiastically30
- ecclesiasticisms29
- editorialization28
- electrifications27
- electroacoustics27
- electrolytically30
- electromagnetism29
- emancipationists27
- enantiomorphisms29
- enforceabilities27
- enthusiastically27
- epigrammatically34
- epizootiological35
- etherealizations29
- evangelistically31
- exceptionability36
- exceptionalities31
- excommunications38
- exemplifications37
- exhaustibilities30
- exhaustivenesses31
- existentialistic28
- experimentations31
- extemporaneities30
- extemporisations30
- extemporizations39
- extensionalities26
- exteriorizations33
- externalisations26
- externalizations35
- extractabilities30
- factitiousnesses24
- falsifiabilities27
- familiarizations33
- fantasticalities24
- fashionabilities26
- fastidiousnesses22
- featherstitching29
- fictionalization34
- fictitiousnesses24
- figurativenesses27
- fissionabilities24
- flabbergastingly34
- flagitiousnesses24
- flibbertigibbets34
- flibbertigibbety36
- foreseeabilities23
- formularizations34
- frenchifications32
- fundamentalistic30
- futilitarianisms25
- gastrointestinal21
- gelatinousnesses22
- goitrogenicities24
- grammaticalities28
- hemagglutinating31
- hemagglutination29
- hepatotoxicities31
- hermaphroditisms30
- heterochromatins27
- heterozygosities31
- homoscedasticity30
- hospitalizations32
- hydrophilicities30
- hydrophobicities32
- hydroxylapatites34
- hygroscopicities31
- hypercompetitive36
- hypercorrections30
- hyperfunctioning35
- hyperinnervation30
- hyperinvolutions31
- hyperparasitisms29
- hyperproductions32
- hyperrationality27
- hypersalivations29
- hypersensitivity30
- hypersensitizing36
- hypersexualities32
- hyperstimulating31
- hyperstimulation29
- hypersusceptible34
- hyperventilating32
- hyperventilation30
- hyperviscosities30
- hypocoristically33
- hypostatizations33
- iconoclastically31
- illimitabilities25
- immortalizations33
- immunodiagnostic31
- immunogeneticist30
- immunogenicities30
- immunoreactivity33
- immunoregulation29
- imperativenesses27
- imperceptiveness33
- impermeabilities29
- implausibilities28
- impracticability34
- impracticalities29
- impregnabilities29
- impressibilities26
- inadvisabilities26
- inalienabilities23
- inalterabilities22
- inappreciatively33
- inarticulateness23
- inauthenticities24
- incautiousnesses23
- incombustibility33
- inconsiderations23
- incontrovertible29
- incontrovertibly31
- inconvertibility31
- incorruptibility30
- indefatigability29
- indefinabilities26
- indemnifications29
- indeterminations23
- indiscriminating28
- indiscrimination26
- indistinctnesses23
- indivisibilities26
- indomitabilities25
- indubitabilities26
- ineffectualities28
- ineluctabilities26
- inexhaustibility33
- inextinguishable34
- inextinguishably36
- infantilizations32
- infectiousnesses25
- inflammabilities31
- infrangibilities27
- inheritabilities23
- innovativenesses27
- insatiablenesses22
- inscrutabilities25
- inseparabilities24
- insolubilization33
- institutionalise20
- institutionalism23
- institutionalist20
- institutionalize29
- instrumentations23
- insubordinations24
- insubstantiality25
- insurrectionists22
- insusceptibility30
- intensifications25
- intensionalities20
- intentionalities20
- interassociation21
- intercalibration25
- intercommunities28
- interconnections26
- intercontinental24
- interconvertible29
- intercorrelating24
- intercorrelation22
- interdigitations21
- interfertilities21