16 letters
- irrevocabilities27
- justiciabilities33
- justifiabilities33
- lamentablenesses26
- landlubberliness29
- largeheartedness23
- lasciviousnesses26
- leukodystrophies30
- libidinousnesses24
- licentiousnesses23
- lightheartedness25
- localizabilities34
- longheadednesses25
- loquaciousnesses32
- lugubriousnesses26
- machineabilities29
- malcontentedness27
- malodorousnesses23
- manageablenesses27
- manipulabilities29
- manipulativeness30
- meaningfulnesses29
- meddlesomenesses26
- meditativenesses25
- megagametophytes33
- megasporogeneses27
- megasporogenesis27
- mendaciousnesses26
- meretriciousness24
- mesembryanthemum37
- metapsychologies32
- methamphetamines33
- methodicalnesses27
- methylcelluloses31
- methylphenidates31
- meticulousnesses26
- microcircuitries29
- microearthquakes38
- microgametocytes32
- miraculousnesses26
- mischaracterizes36
- monotonousnesses23
- montmorillonites26
- motherlessnesses23
- motionlessnesses22
- muddleheadedness28
- multidisciplines30
- multifariousness26
- multiprocessings30
- mysteriousnesses23
- nanotechnologies27
- necessitarianism24
- neglectfulnesses29
- neighborlinesses26
- neoconservatives29
- nephrotoxicities32
- neurochemistries26
- neuropathologies26
- neuroradiologies22
- newfanglednesses29
- newsworthinesses26
- nonarbitrariness22
- nonarchitectures27
- nonconservatives30
- nondestructively30
- nondocumentaries27
- nonestablishment28
- nonindependences29
- noninterferences26
- nonobjectivities37
- nonprofessionals26
- nonproprietaries24
- northwesternmost26
- noteworthinesses23
- nutritiousnesses20
- objectlessnesses33
- obsequiousnesses31
- obstreperousness24
- oleaginousnesses22
- oligodendrocytes27
- oligonucleotides26
- oligosaccharides28
- openhandednesses26
- ophthalmoscopies33
- opinionativeness26
- oppressivenesses27
- organophosphates29
- ostentatiousness19
- osteoarthritides19
- otherworldliness25
- otolaryngologies25
- outlandishnesses23
- outrageousnesses21
- overcommunicates34
- overgenerosities23
- overindebtedness27
- overorchestrated26
- overorchestrates25
- overprescription30
- oxyphenbutazones45
- oxytetracyclines35
- paleogeographies29
- paleopathologies28
- pancreatectomies29
- papillomaviruses32
- paradoxicalities31
- paraprofessional27
- parapsychologies32
- pardonablenesses26
- partridgeberries25
- passionatenesses21
- perceptibilities29
- perceptivenesses30
- percussivenesses28
- peremptorinesses26
- perfectibilities29
- perfectivenesses30
- perfidiousnesses25
- performabilities29
- periodontologies24
- permissibilities26
- permissivenesses27
- perniciousnesses25
- personablenesses25
- persuasivenesses25
- pertinaciousness25
- petrochemistries27
- phosphocreatines30
- phosphorescences33
- phosphorescently33
- photochemistries29
- photodissociates25
- photogrammetries29
- photorespiration25
- photosynthesized36
- photosynthesizes35
- phototypesetters26
- phototypesetting29
- phytochemistries31
- phytoflagellates31
- phytogeographies32
- phytopathologies31
- phytosociologies29
- pleasurabilities25
- polarizabilities33
- polydispersities26
- polyelectrolytes29
- portentousnesses22
- possessivenesses24
- posthumousnesses27
- postpresidential25
- postresurrection24
- practicabilities29
- praiseworthiness25
- precariousnesses24
- precociousnesses27
- predaceousnesses25
- predictabilities27
- preposterousness24
- presentabilities24
- preservabilities27
- preservationists24
- prestidigitation23
- prestidigitators22
- presumptuousness29
- presuppositional28
- preventabilities28
- preventivenesses29
- processabilities26
- processibilities26
- prodigiousnesses24
- productivenesses29
- professionalisms27
- professionalized34
- professionalizes33
- profitablenesses27
- pronunciamentoes29
- propertylessness26
- propitiousnesses24
- prosperousnesses24
- protectivenesses27
- protrusivenesses25
- pseudepigraphies31
- pseudocoelomates28
- pseudonymousness29
- pugnaciousnesses28
- purposefulnesses29
- puzzleheadedness44
- pyelonephritides29
- pyrometallurgies29
- quantitativeness32
- questionableness32
- quintessentially32
- radiochemistries25
- radiotelemetries21
- radiotelephonies24
- rambunctiousness29
- rampageousnesses26
- reafforestations23
- reasonablenesses22