14 letters
- ornithischians23
- overcompliance32
- overenthusiasm25
- overspecialize34
- paediatricians22
- palatialnesses20
- panleukopenias28
- paradisiacally25
- patresfamilias24
- pedestrianisms22
- penitentiaries19
- pestilentially23
- phantasmagoria25
- pharmacopoeial29
- pharmacopoeias28
- phenothiazines32
- pictorializing33
- pitiablenesses22
- postcollegiate24
- postindustrial21
- postmillennial25
- potentialities19
- predestinarian20
- preferentially25
- premillenarian24
- presbyterially26
- presidentially23
- professorially24
- professoriates20
- proletarianise19
- proletarianize28
- pronunciamento27
- pronunciations24
- prothonotarial21
- protohistorian20
- providentially27
- provincialisms29
- provincialists26
- provincialized36
- provincializes35
- psychasthenias27
- psychosocially31
- quincentennial32
- quinquennially41
- quintessential27
- reappropriated24
- reappropriates23
- reconciliation23
- reconciliatory24
- rectifiability26
- referentiality21
- reliablenesses20
- rematerialized28
- rematerializes27
- reminiscential23
- renegotiations18
- repudiationist20
- sabermetrician24
- schizophrenias34
- sectarianizing30
- semiautomatics24
- semiautonomous23
- semicentennial24
- semicommercial30
- semiofficially30
- septuagenarian22
- serializations25
- serodiagnostic21
- sesquipedalian30
- sociablenesses22
- socializations28
- solitudinarian19
- specialisation22
- specialization31
- spermatogonial24
- subproletariat22
- subsidiarities19
- subspecialists25
- subspecialized35
- subspecializes34
- subspecialties25
- substantiality22
- substantiating22
- substantiation20
- substantiative23
- superficiality27
- syringomyelias25
- telangiectasia21
- tercentennials21
- territorialism18
- territorialist15
- territoriality17
- territorialize24
- thiabendazoles31
- transferential20
- triamcinolones23
- triangulations20
- trichomoniases23
- trichomoniasis23
- trivialization29
- ultraminiature21
- unappreciation26
- unappreciative29
- unappropriated26
- unbiasednesses21
- unclassifiable27
- uncongeniality26
- uncredentialed23
- undeniableness23
- undercarriages22
- unenthusiastic23
- unidentifiable25
- uniformitarian23
- uningratiating22
- unquantifiable34
- unsociableness24
- utilitarianism20
- valedictorians24
- valetudinarian23
- variablenesses23
- vegetarianisms24
- verifiableness26
- xenodiagnostic29
- xerophthalmias32