12 letters
- nonfinancial23
- nonidentical20
- nonmercurial22
- nonmicrobial24
- nonmunicipal26
- nonnumerical23
- nonpolitical22
- nonpractical24
- nonspherical23
- nonsteroidal16
- nontechnical24
- nonuniversal21
- occupational24
- oligarchical24
- oppositional20
- orographical23
- osteological19
- overcritical23
- paraboloidal21
- paradisaical20
- paradisiacal20
- paratactical22
- pathological24
- perceptional23
- perichondral23
- perorational17
- perspectival26
- pestilential18
- petrological22
- phenological25
- phenotypical27
- philological25
- phonological25
- phycological29
- planetesimal21
- platitudinal20
- pneumococcal30
- populational22
- possessional17
- postbiblical26
- postcolonial21
- postdoctoral20
- posthospital21
- postimperial22
- postmedieval24
- postneonatal18
- postprandial21
- postsurgical22
- postvaccinal27
- precentorial20
- preceptorial22
- precessional20
- preferential20
- preinaugural21
- premenstrual21
- prerehearsal18
- presbyterial21
- presidential18
- procathedral22
- processional20
- productional22
- professional20
- professorial19
- projectional29
- proportional20
- protonematal20
- prototypical24
- providential22
- pseudopodial22
- psychosexual31
- psychosocial26
- pyromaniacal25
- quarterfinal27
- quasicrystal28
- quinquennial36
- radiological20
- recreational17
- reflectional21
- repetitional17
- reputational18
- retinotectal17
- rhombohedral24
- saccharoidal22
- salutational16
- scatological22
- schismatical24
- schistosomal21
- secobarbital22
- semiarboreal19
- semicolonial21
- semimystical24
- semiofficial25
- semiological22
- semitropical22
- sericultural19
- sociological22
- speciational20
- spectatorial19
- spermatozoal28
- stenothermal19
- sternocostal17
- subeditorial18
- subepidermal24
- subprincipal27
- substantival22
- successional21
- superhelical23
- supernatural19
- superspecial23
- supplemental25
- supraliminal22
- supraorbital20
- synaptosomal22
- synchronical25
- tautological20
- teleological20
- theocratical21
- theosophical23
- timocratical22
- tragicomical24
- transitional15
- transnatural16
- tribological22
- triglyphical26
- triphthongal23
- trochanteral19
- tropological22
- ultraliberal19
- ultraradical19
- uncommercial27
- unecological24
- uneconomical25
- unhistorical20
- unhysterical22
- unrhetorical20
- unscriptural22
- urinogenital18
- vegetational20
- ventromedial22
- visitatorial17
- viticultural23
- zootechnical31