Mammoth Uncensored Word List:
68 words ending with n, 18 letters long

antiadministration antidiscrimination bourgeoisification chlorofluorocarbon counterinstitution counterreformation counterretaliation crossfertilisation crossfertilization disproportionation electrocoagulation electrodesiccation establishmentarian evapotranspiration grammaticalization greatgrandchildren hyperconcentration hypersensitization iatromathematician intercommunication medicalexamination microencapsulation neovascularization nondifferentiation nondiversification nonstandardization noventrigintillion operationalisation operationalization overcapitalisation overcapitalization overcentralisation overcentralization overclassification overgeneralisation overgeneralization overidentification overinterpretation overneutralization overrepresentation oversimplification overspecialisation overspecialization ovolactovegetarian photodecomposition photoisomerisation photoisomerization photosensitisation photosensitization phytohemagglutinin polyesterification postmultiplication proletarianisation proletarianization radiosensitization sentimentalisation sentimentalization septemvigintillion subminiaturization supersensitisation supersensitization territorialization transmogrification transubstantiation trigintacentillion undersocialisation underspecification xenotransplanation