16 letters
- disequilibration32
- disestablishment27
- disfranchisement30
- dishonorableness25
- disillusionments25
- disingenuousness24
- disintoxications29
- disjointednesses29
- disorderednesses20
- disorderlinesses20
- disorganizations30
- dispensabilities25
- dispersivenesses25
- dispiritednesses22
- disproportionate24
- disproportioning27
- disputatiousness23
- disqualification35
- disreputableness26
- disruptivenesses26
- dissatisfactions24
- dissipatednesses22
- dissociabilities24
- dissuasivenesses23
- distensibilities22
- distributivities25
- distributorships26
- dithiocarbamates28
- diversifications28
- diverticulitises26
- dodecaphonically34
- dogmaticalnesses27
- dolichocephalies32
- ecclesiastically30
- ecclesiasticisms29
- echocardiography34
- eclaircissements27
- ecophysiological33
- editorialization28
- electrifications27
- electroacoustics27
- electrochemistry30
- electrodeposited25
- electrohydraulic30
- electrolytically30
- electromagnetism29
- electrophilicity31
- electrophoresing28
- electrosurgeries23
- electrotherapies25
- electrotonically28
- elementarinesses22
- emancipationists27
- embourgeoisement29
- enantiomorphisms29
- encephalitogenic32
- encephalopathies31
- encyclopedically37
- endarterectomies24
- endocrinological29
- endocrinologists25
- endopolyploidies29
- enforceabilities27
- enfranchisements30
- enterochromaffin32
- enteropathogenic28
- enthusiastically27
- entrepreneurship27
- environmentalism30
- environmentalist27
- epichlorohydrins31
- epigrammatically34
- epiphenomenalism33
- epizootiological35
- equalitarianisms31
- erythroblastosis24
- eschatologically31
- etherealizations29
- ethnographically33
- euphoniousnesses25
- evangelistically31
- exceptionability36
- exceptionalities31
- excommunications38
- exemplifications37
- exhaustibilities30
- exhaustivenesses31
- existentialistic28
- experimentalisms34
- experimentalists31
- experimentations31
- expressionlessly31
- expressivenesses31
- extemporaneities30
- extemporisations30
- extemporizations39
- extensionalities26
- exteriorizations33
- externalisations26
- externalizations35
- exterritoriality26
- extractabilities30
- extracurriculars32
- extraterrestrial24
- extraterritorial24
- factitiousnesses24
- faintheartedness24
- fallaciousnesses26
- falsifiabilities27
- familiarizations33
- fantasticalities24
- farsightednesses25
- fashionabilities26
- fastidiousnesses22
- featherstitching29
- feeblemindedness30
- felicitousnesses25
- ferroelectricity28
- fictionalization34
- fictitiousnesses24
- figurativenesses27
- fissionabilities24
- flabbergastingly34
- flagitiousnesses24
- flexographically41
- flibbertigibbets34
- flibbertigibbety36
- fluoroscopically34
- forebodingnesses27
- foreseeabilities23
- formidablenesses28
- formularizations34
- forthrightnesses26
- fortuitousnesses22
- frenchifications32
- friendlessnesses23
- fundamentalistic30
- futilitarianisms25
- gastrointestinal21
- gelatinousnesses22
- generalizability35
- geochronological31
- geochronologists27
- geomorphological33
- geomorphologists29
- goitrogenicities24
- governmentalisms31
- governmentalists28
- governmentalized38
- governmentalizes37
- grammaticalities28
- gratuitousnesses21
- gregariousnesses22
- gynandromorphies31
- gynandromorphism34
- harmoniousnesses24
- hemagglutinating31
- hemagglutination29
- hematoporphyrins32
- hemoglobinopathy35
- hendecasyllabics33
- hepatotoxicities31
- hermaphroditisms30
- heterochromatins27
- heterozygosities31
- hexylresorcinols33
- hieroglyphically35
- highhandednesses28
- histochemistries26
- histopathologies26
- histopathologist26
- histophysiologic31
- historicalnesses23
- historiographers25
- historiographies25
- homoscedasticity30
- hospitalizations32
- humanitarianisms27
- hydrodynamically35
- hydrodynamicists31
- hydroelectricity30
- hydrophilicities30
- hydrophobicities32
- hydroxylapatites34
- hygroscopicities31
- hypercatabolisms33
- hypercompetitive36
- hypercorrections30
- hyperexcitements37
- hyperfunctioning35
- hyperinnervation30
- hyperinsulinisms30
- hyperintelligent29
- hyperinvolutions31
- hypermetabolisms33
- hyperparasitisms29
- hyperpituitarism30
- hyperproductions32
- hyperrationality27
- hypersalivations29