15 letters
- inspirationally24
- instructorships25
- intemperateness23
- intercomparison26
- interdependence26
- interdependency28
- interoperatives23
- interparoxysmal32
- interpellations22
- interpenetrated21
- interpenetrates20
- interperceptual27
- interpermeating25
- interpersonally24
- interphalangeal26
- interpopulation25
- interpretations20
- interprovincial28
- intraperitoneal21
- intrapopulation25
- intrapreneurial22
- introspectional24
- introspectively29
- intussuscepting27
- intussusception25
- intussusceptive28
- ionospherically28
- irreparableness23
- irrepealability25
- jurisprudential32
- juxtapositional37
- legislatorships24
- lepidopterology28
- lexicographical37
- logographically32
- lymphadenitises28
- lymphadenopathy35
- lymphangiograms34
- lymphogranuloma34
- lymphosarcomata32
- lyophilizations34
- macrophotograph33
- macroscopically34
- malpractitioner26
- mechanoreceptor30
- megacorporation27
- megagametophyte32
- megasporophylls32
- mercaptopurines29
- metallographers27
- metallographies27
- metamorphically33
- methamphetamine32
- methylphenidate30
- microbarographs31
- micromorphology34
- microphotograph33
- microphotometer29
- microphotometry31
- microphysically35
- microporosities24
- microprocessors27
- microprojection37
- microprojectors36
- micropublishers31
- micropublishing34
- micropulsations27
- microradiograph29
- microscopically34
- microsporangium31
- microsporocytes29
- microsporophyll33
- misapplications29
- misapprehending31
- misapprehension28
- misappropriated28
- misappropriates27
- miscomputations29
- misdescriptions26
- misinterpreting25
- misrepresenting25
- monopolizations33
- monopropellants28
- monospecificity33
- morphologically33
- morphophonemics35
- multidiscipline29
- multiplications28
- multipolarities24
- multiprocessing29
- multiprocessors26
- myelencephalons32
- nephrectomizing39
- neurohypophyses31
- neurohypophysis31
- neuropathically29
- neuropathologic28
- neurophysiology29
- neuropsychiatry29
- neuropsychology32
- nincompooperies29
- nonbiographical31
- noncompressible30
- noncomputerized37
- nonconsumptions29
- noncontemporary29
- noncooperations24
- nondepartmental26
- nondevelopments30
- nonencapsulated27
- nonexperimental32
- nonexploitation29
- nonexploitative32
- nonhospitalized33
- nonimplications28
- nonimportations24
- nonindependence28
- nonmetaphorical29
- nonmetropolitan25
- nonoccupational29
- nonoverlappings31
- nonparticipants27
- nonpartisanship26
- nonperformances30
- nonphilosophers28
- nonphotographic32
- nonpreferential25
- nonprescription27
- nonprofessional25
- nonprofessorial24
- nonprogressives26
- nonpsychiatrist27
- nonreproducible29
- nonreproductive29
- nonsaponifiable28
- nonspecifically33
- norepinephrines26
- nucleophilicity32
- oceanographical30
- omnicompetences32
- openheartedness23
- openmouthedness27
- operationalisms23
- operationalists20
- operativenesses23
- ophthalmologies29
- ophthalmologist29
- ophthalmoscopes32
- ophthalmoscopic35
- opinionatedness22
- opportunenesses24
- opprobriousness26
- optoelectronics26
- organophosphate28
- orthophosphates27
- orthopsychiatry29
- oscillographies27
- osteopathically27
- outdoorsmanship26
- outmanipulating28
- outspokennesses25
- overapplication30
- overcapitalized36
- overcapitalizes35
- overcompensated30
- overcompensates29
- overcompliances33
- overcomplicated33
- overcomplicates32
- overcompressing31
- overconsumption31
- overdependences29
- overdevelopment32
- overemphasizing39
- overexpectation33
- overopinionated25
- overpersuasions24
- overpopulations28
- overprescribing31
- overproductions28
- overprogramming33
- overproportions26
- overprotections26
- overrepresented24
- oversimplifying34
- overspecialized36
- overspecializes35
- overspeculating30
- overspeculation28
- ovoviviparously34
- oxyphenbutazone44
- painterlinesses21
- palatablenesses24
- palatalizations30
- paleobiological29
- paleobiologists25
- paleoecological29
- paleoecologists25
- paleogeographic31
- paleomagnetisms28