12 letters
- monosyllabic26
- monosynaptic25
- monotheistic21
- monotonicity22
- morphometric26
- multichannel25
- multicolored22
- multicourses21
- multipicture24
- multiplicand26
- multiplicity26
- multiservice24
- municipality26
- municipalize33
- munificences27
- munificently27
- museological23
- musicalising23
- musicalities20
- musicalizing32
- musicianship25
- musicologies22
- musicologist22
- mutagenicity24
- myeloblastic25
- mythological26
- narcissistic19
- narcoleptics23
- narcotically23
- natriuretics17
- naturalistic18
- naturopathic22
- nazification29
- necrological23
- negativistic22
- neoclassical21
- neorealistic17
- nephelinitic23
- nephropathic26
- neurasthenic20
- neuroleptics21
- neurological21
- neurotically21
- neuroticisms20
- neutralistic18
- neutrophilic23
- nickelodeons23
- nicotinamide21
- nidification21
- nominalistic21
- nonacademics24
- nonaddictive23
- nonadiabatic21
- nonaesthetic19
- nonalcoholic24
- nonantigenic21
- nonautomatic21
- nonchemicals26
- nonclassical22
- nonclericals22
- nondiabetics21
- nondomestics21
- nonelectrics21
- nonempirical24
- nonenzymatic32
- nonfictional22
- nonhemolytic25
- nonidentical20
- nonmetameric23
- nonmicrobial24
- nonmunicipal26
- nonmusicians22
- nonnumerical23
- nonparasitic20
- nonphysician25
- nonpolitical22
- nonpractical24
- nonpsychotic27
- nonrealistic18
- nonspherical23
- nonstrategic19
- nonsymmetric25
- nontechnical24
- normothermic24
- notification20
- nucleophilic27
- nympholeptic30
- obstetrician19
- octosyllabic25
- officeholder25
- officialdoms26
- officialeses22
- officialisms25
- officiations22
- oligarchical24
- oligotrophic23
- oncogenicity24
- onomastician20
- onomatopoeic22
- operatically22
- oratorically19
- organicities18
- organoleptic22
- ornithologic21
- orographical23
- orthodontics19
- orthogenetic20
- orthographic24
- orthopaedics21
- orthorhombic25
- ossification19
- osteoblastic19
- osteoclastic19
- osteological19
- osteoplastic19
- osteoporotic18
- outpoliticks24
- overcritical23
- overdramatic23
- overemphatic27
- overexplicit30
- overmedicate23
- overserviced24
- overservices23
- pacification25
- pacificators24
- paedogenetic22
- paedomorphic27
- paleobotanic23
- paleographic26
- palingenetic23
- panchromatic27
- pantechnicon26
- pantographic26
- paradigmatic24
- paradisaical20
- paramagnetic24
- paramedicals23
- paranoically23
- paraphrastic23
- parasiticide19
- paratactical22
- paronomastic22
- participants22
- participated22
- participates21
- participator21
- particularly23
- particulates20
- pathetically24
- pathogenetic23
- pathological24
- pedantically24
- pediatrician20
- penicilliums25
- pericarditis19
- perichondral23
- perichondria22
- periodically23
- periodontics20
- peripatetics21
- periphrastic23
- peritrichous21
- perniciously23
- perspicacity26
- petrogenetic21
- petrographic25
- petrological22
- phagocytotic27
- pheneticists21
- phenocrystic26
- phenological25
- phenotypical27
- philharmonic27
- philhellenic26
- philological25
- phonemically28
- phonemicists24
- phonetically25
- phoneticians22
- phonogrammic29
- phonographic28
- phonological25
- phonotactics24
- phosphatidic26
- phosphoritic25
- photochromic28
- photodynamic27
- photographic27
- photokinetic25
- photomosaics23
- photospheric25
- photovoltaic25
- phycological29
- phyletically27
- phyllotactic27
- phylogenetic26
- physicalisms26
- physicalists23
- physicalness24