15 letters
- insensibilities21
- insensitivities21
- insidiousnesses19
- insignificances29
- insociabilities23
- insolublenesses23
- instantaneities18
- insufficiencies30
- intangibilities23
- integrabilities22
- intensivenesses22
- intercorrelates20
- interelectrodes21
- interinfluences26
- intermittencies23
- interoperatives23
- interpenetrates20
- interrogatories18
- interstratifies19
- intransigeances23
- intricatenesses20
- intrusivenesses22
- intuitivenesses22
- invariabilities24
- invectivenesses28
- inventivenesses26
- invidiousnesses23
- invincibilities28
- inviolabilities25
- inviolatenesses22
- invisiblenesses25
- irasciblenesses23
- irrationalities17
- irreconcilables27
- irritablenesses20
- judiciousnesses31
- kaffeeklatsches35
- kittenishnesses23
- laboriousnesses21
- laughablenesses26
- lecherousnesses23
- leisurelinesses19
- leukaemogeneses27
- lickerishnesses26
- lightfastnesses24
- lightsomenesses24
- lignocelluloses26
- lignosulfonates25
- limitlessnesses21
- litigiousnesses20
- loathsomenesses22
- lucrativenesses25
- ludicrousnesses23
- luxuriousnesses27
- lymphadenitises28
- machinabilities28
- macroaggregates27
- macrostructures26
- maladroitnesses21
- maliciousnesses24
- manageabilities25
- marketabilities26
- marvelousnesses25
- masterfulnesses24
- mastoidectomies25
- materfamiliases25
- measurabilities23
- melodiousnesses22
- memorablenesses26
- mensurabilities24
- mercaptopurines29
- mercenarinesses23
- mercilessnesses23
- mercurialnesses24
- metallographies27
- metastabilities22
- methoxyfluranes35
- methylmercuries30
- methylxanthines34
- microelectrodes26
- micrometeorites24
- microporosities24
- microsporocytes29
- microstructures26
- microtechniques37
- microtonalities23
- millionairesses21
- misappropriates27
- miserablenesses23
- misguidednesses24
- modifiabilities26
- momentarinesses23
- momentousnesses24
- mononucleotides26
- monosaccharides28
- monounsaturates22
- monstrousnesses21
- monumentalities25
- mountebankeries28
- multipolarities24
- murderousnesses22
- negligibilities25
- negotiabilities22
- nervelessnesses22
- neurohypophyses31
- neurotoxicities27
- niggardlinesses23
- nincompooperies29
- nitrocelluloses23
- nitroglycerines25
- nonadditivities23
- nonbarbiturates24
- noncoincidences29
- noncombustibles31
- nonconcurrences29
- nonconformances31
- nonconformities27
- noncreativities24
- nonelectrolytes24
- nonequivalences36
- nonintercourses22
- nonperformances30
- nonprogressives26
- nonrandomnesses23
- nonstationaries18
- nonuniformities25
- nonuniquenesses30
- nonuniversities23
- norepinephrines26
- normativenesses24
- nucleosyntheses26
- objectivenesses35
- obliviousnesses25
- obnoxiousnesses28
- observabilities26
- obsessivenesses23
- obstinatenesses20
- obtainabilities23
- obtrusivenesses24
- offensivenesses27
- offhandednesses27
- officiousnesses26
- omnicompetences32
- operativenesses23
- ophthalmologies29
- ophthalmoscopes32
- opportunenesses24
- organochlorines25
- orthogonalities21
- orthophosphates27
- oscillographies27
- osteomyelitides22
- outspokennesses25
- overaccentuates27
- overarticulates24
- overcapitalizes35
- overcentralizes33
- overcompensates29
- overcompliances33
- overcomplicates32
- overconfidences31
- overdependences29
- overdiversities24
- overeagernesses22
- overembellishes29
- overexaggerates30
- overgeneralizes32
- overhomogenizes36
- overindulgences29
- overingenuities24
- overintensities21
- overspecializes35
- overstabilities23
- oversweetnesses23
- oxidoreductases28
- painterlinesses21
- palatablenesses24
- paramyxoviruses35
- paranormalities23
- pararosanilines21
- parasexualities27
- parthenocarpies27
- parthenogeneses24
- particularities23
- patentabilities23
- pathogenicities26
- peaceablenesses26
- pectinesterases22
- pendulousnesses24
- penetrabilities23
- pentobarbitones26
- penuriousnesses22
- perdurabilities24
- perishabilities24
- permanentnesses24
- pervasivenesses27
- pervertednesses24
- pharmacognosies29
- phenobarbitones28
- phenomenologies28