13 letters
- insidiousness17
- insignificant24
- insincerities18
- insinuatingly22
- insociability23
- insolubilized30
- insolubilizes29
- insolubleness21
- inspectorates20
- inspectorship25
- inspirational19
- inspiritingly23
- inspissations18
- instabilities18
- installations17
- instantaneity18
- instantaneous17
- instantiating18
- instantiation16
- instantnesses16
- instaurations16
- instillations17
- instinctively25
- instinctually23
- institutional17
- instructional20
- instructively25
- instrumentals20
- instrumenting22
- insubordinate20
- insubstantial20
- insufficiency30
- insufflations23
- insupportable25
- insupportably27
- insurrections19
- insusceptible25
- insusceptibly27
- intellections20
- intenerations16
- intensenesses16
- intensionally20
- intensiveness20
- interceptions21
- intercessions18
- interdictions19
- interjections27
- intermissions18
- interruptions19
- intersections18
- intersessions15
- interventions20
- intimidations19
- intoxications25
- intransigeant18
- intransigence21
- intransigents18
- intrinsically22
- introductions20
- introjections27
- intromissions18
- introversions19
- invaginations22
- invalidations21
- invigilations22
- invigorations21
- irresolutions16
- irresponsible21
- irresponsibly23
- jurisconsults29
- jurisdictions28
- kindergartens22
- labanotations19
- laterizations24
- latinizations25
- legalizations27
- legitimations20
- lepidopterans22
- librarianship23
- liquefactions31
- localizations28
- luteotrophins21
- lysolecithins23
- mainstreaming23
- majoritarians26
- malformations24
- malnutritions20
- malocclusions26
- malversations22
- manipulations23
- manslaughters23
- marksmanships29
- masturbations21
- maximizations36
- melanizations28
- memorizations29
- menstruations19
- mensurability24
- metropolitans21
- midafternoons22
- minimizations30
- ministrations18
- misconstruing24
- misdirections21
- miseducations22
- misquotations27
- mistranscribe23
- mistranslated19
- mistranslates18
- mobilizations30
- modifications24
- monetizations27
- monstrosities17
- monstrousness19
- moralizations27
- motorizations26
- mountainsides20
- multibillions24
- multimegatons24
- multimillions24
- multivitamins26
- musicianships26
- nasalizations25
- nazifications30
- nebulizations29
- neurosurgeons19
- nidifications22
- nonadmissions20
- nonagenarians19
- nonconsensual22
- noneducations21
- noninclusions22
- noninsurances21
- nonlibrarians20
- nonmainstream22
- nonphysicians26
- nonresponsive23
- nonscientific25
- nonscientists19
- nonsegregated20
- nonsensically23
- nonsequential27
- nonshrinkable26
- nonsocialists19
- nonspecialist22
- nonstationary18
- nonstructural21
- nonstructured21
- nonsubjective35
- nonsubsidized30
- nonsystematic23
- noradrenalins18
- normotensives22
- notarizations24
- notifications21
- novelizations29
- obliterations18
- obnubilations23
- obstetricians20
- octogenarians20
- offensiveness25
- oleandomycins25
- ombudsmanship30
- onomasticians21
- onychophorans27
- optimisations20
- optimizations29
- organisations17
- organizations26
- ossifications20
- overconscious25
- overconstruct25
- overconsuming28
- overexertions25
- overexpansion29
- overextension26
- overinsistent19
- overintensity21
- overlengthens24
- overreactions21
- oversensitive22
- overtaxations25
- pacifications26
- painstakingly27
- pancreozymins35
- pantechnicons27
- paralyzations29
- parkinsonisms25
- partisanships22
- pediatricians21
- penalizations28
- pensivenesses22
- perpetrations20
- perpetuations21
- perspirations20
- perturbations21
- petrifactions23
- phalansteries20
- philodendrons23
- pigmentations23