16 letters
- incrediblenesses26
- indecisivenesses26
- indefinitenesses23
- indelicatenesses23
- indigenousnesses23
- indispensability28
- indisputableness27
- indissolubleness25
- inevitablenesses26
- inexorablenesses29
- inexplicableness36
- inexpressiveness32
- inexpugnableness36
- inflexiblenesses33
- ingressivenesses24
- inhospitableness27
- inimitablenesses25
- innovativenesses27
- inordinatenesses20
- insatiablenesses22
- insensiblenesses23
- instrumentalisms26
- instrumentalists23
- instrumentations23
- insufferableness29
- intangiblenesses25
- intelligibleness26
- intensifications25
- intensionalities20
- intentionalities20
- intercontinental24
- interdependences27
- interdependently27
- intergenerations21
- interinfluencing30
- intermediateness22
- interminableness26
- interpenetrating24
- interpenetration22
- intertestamental22
- interventionisms26
- interventionists23
- interventricular27
- intransitiveness23
- intraventricular27
- invaluablenesses28
- invinciblenesses30
- inviolablenesses27
- invulnerableness29
- irremediableness25
- irresistibleness21
- irresolutenesses19
- irresponsiveness25
- lamentablenesses26
- latensifications25
- licentiousnesses23
- malapportionment31
- malcontentedness27
- manageablenesses27
- manipulativeness30
- meddlesomenesses26
- meditativenesses25
- megasporogeneses27
- megasporogenesis27
- mendaciousnesses26
- methylphenidates31
- microencapsulate31
- microenvironment32
- micromanagements32
- misapprehensions29
- miscomprehension32
- multidimensional28
- neurasthenically28
- noncomplementary34
- noncomprehension31
- nondocumentaries27
- nonentertainment24
- nonestablishment28
- nonindependences29
- noninterferences26
- noninterventions25
- nonreappointment29
- nonschizophrenic41
- oligodendrocytes27
- oligodendroglial26
- oligodendroglias25
- openhandednesses26
- opinionativeness26
- oppressivenesses27
- orthogenetically28
- ostentatiousness19
- overaccentuating31
- overachievements33
- overcentralizing37
- overcompensating33
- overcompensation31
- overcompensatory32
- overdevelopments33
- overenthusiastic27
- overgeneralizing36
- overgenerosities23
- overhomogenizing40
- oxyphenbutazones45
- paedogenetically30
- pardonablenesses26
- parliamentarians25
- passionatenesses21
- perceptivenesses30
- percussivenesses28
- perfectivenesses30
- permissivenesses27
- perpendicularity31
- personablenesses25
- persuasivenesses25
- phenolphthaleins32
- phenomenological33
- phenomenologists29
- phenylethylamine34
- phenylketonurias31
- phenylketonurics34
- philoprogenitive32
- phosphorescences33
- phosphorescently33
- photomorphogenic35
- photosensitivity28
- photosensitizers31
- photosensitizing34
- phylogenetically34
- polycondensation29
- portentousnesses22
- possessivenesses24
- postencephalitic32
- postexperimental34
- postindependence30
- postmillenarians26
- postpresidential25
- prekindergartens28
- premillennialism30
- premillennialist27
- prenotifications27
- presentabilities24
- preventabilities28
- preventivenesses29
- productivenesses29
- profitablenesses27
- pronunciamentoes29
- protectivenesses27
- protrusivenesses25
- pseudoparenchyma35
- pseudoscientific31
- pseudoscientists25
- quadricentennial34
- quantitativeness32
- questionableness32
- quintessentially32
- radiosensitivity24
- reapportionments27
- reasonablenesses22
- recentralization31
- reconcentrations25
- reestablishments26
- referentialities21
- reflectivenesses28
- refractivenesses27
- regeneratenesses20
- regressivenesses23
- relentlessnesses20
- remarkablenesses28
- remunerativeness26
- renormalizations31
- repetitivenesses24
- reprehensibility28
- representational22
- representatively27
- representativity26
- repressivenesses24
- respectivenesses27
- responsivenesses25
- revengefulnesses29
- roentgenographic30
- roentgenological27
- roentgenologists23
- sclerenchymatous32
- seasonablenesses22
- sedimentological28
- sedimentologists24
- semigovernmental31
- sensationalising22
- sensationalistic22
- sensationalizing31
- sentimentalising25
- sentimentalities22
- sentimentalizing34
- septendecillions27
- sesquicentennial33
- stenographically31
- stupendousnesses24
- subjectivenesses37
- submissivenesses28
- subversivenesses29