13 letters
- peculiarities21
- pentaploidies22
- periodicities20
- persistencies20
- personalities18
- perspicuities23
- pertinacities20
- petrographies23
- phalansteries20
- phonographies26
- photographies25
- phraseologies21
- physicalities24
- physiognomies26
- pictographies26
- pietistically23
- piezoelectric32
- placabilities24
- planetologies21
- planographies25
- plantocracies24
- playabilities23
- polarimetries20
- poltrooneries18
- polybutadiene25
- polychotomies27
- polydactylies26
- pornographies24
- portabilities20
- possibilities20
- preamplifiers26
- predeliveries22
- preinterviews24
- preliminaries21
- prematurities20
- presanctified24
- prescientific26
- primatologies22
- primitivities23
- probabilities23
- prodigalities20
- proficiencies26
- prolificacies26
- prolificities23
- promiscuities23
- propinquities30
- proprietaries19
- proprietorial20
- protogalaxies26
- protonotaries17
- prototrophies21
- pseudoscience25
- psychometries26
- psychopathies28
- pteridologies20
- punctualities23
- questionaries24
- quotabilities27
- radiographies21
- rationalities15
- reactionaries17
- readabilities18
- receptivities23
- reciprocities22
- rediscoveries21
- reexperienced28
- reexperiences27
- reflexivities28
- reflexologies27
- reformatories19
- reinterviewed22
- reliabilities18
- religiosities16
- rentabilities18
- reorientating17
- reorientation15
- reprographies23
- resistivities17
- retentivities18
- retinopathies19
- retinoscopies20
- reusabilities18
- rhabdomancies26
- rhinoplasties20
- rhythmicities25
- roadabilities18
- rubicundities23
- salmonberries21
- scenographies24
- schistosities18
- seasonalities15
- seismometries19
- selectivities21
- semasiologies19
- semiaridities17
- semiempirical26
- semievergreen23
- semimonthlies23
- sensibilities18
- sensitivities18
- serendipities18
- serriednesses15
- silverberries21
- singularities18
- skulduggeries25
- sociabilities20
- solvabilities22
- somnifacients24
- sorbabilities20
- soteriologies16
- sovereignties20
- sovietization27
- specificities25
- specularities21
- spiegeleisens20
- spiritualties18
- splenectomies24
- spontaneities18
- squirearchies28
- stenographies21
- stereophonies19
- stereoscopies19
- stichomythies25
- stipendiaries18
- stratocracies19
- strenuosities15
- studiednesses17
- stylographies23
- subassemblies24
- subcategories22
- subclassified25
- subclassifies24
- subcontraries21
- subindustries20
- sublieutenant21
- subliteracies21
- subserviences25
- subserviently25
- subtreasuries18
- sufficiencies27
- suitabilities18
- summabilities24
- superachiever26
- superagencies23
- supercarriers20
- superfamilies24
- superfluities22
- superiorities17
- superluxuries27
- suppositories20
- syllabicities23
- taciturnities18
- tangibilities20
- technocracies25
- temporalities20
- tensiometries17
- terminologies20
- testabilities17
- tetraploidies18
- thanatologies19
- thaumaturgies22
- thermometries21
- thoracotomies21
- totipotencies20
- tracheotomies21
- tragicomedies22
- tranquilities25
- transpiercing23
- triaxialities21
- ultrararefied19
- unaccompanied29
- unbelievingly29
- uncertainties19
- underachieved26
- underachiever25
- underachieves25
- undersupplies24
- unelectrified23
- unfriendliest21
- unorthodoxies25
- unqualifiedly33
- unquietnesses26
- uranographies22
- valedictories22
- variabilities21
- vascularities22
- vendibilities23
- ventriloquies29
- versatilities18
- verticalities21
- vexillologies29
- vicegerencies26
- viceroyalties23
- victimologies26
- videographies25
- violabilities22
- volcanicities25
- volcanologies25
- vulcanicities26
- vulcanologies26