14 letters
- posteriorities17
- postmistresses20
- potentialities19
- practicalities24
- prankishnesses25
- preciousnesses22
- precipitancies27
- preconsciouses25
- prediscoveries25
- predominancies26
- preestablishes23
- pregnabilities24
- prehensilities21
- premaxillaries29
- preoccupancies31
- preparednesses22
- preponderances26
- prepubescences31
- previousnesses23
- pridefulnesses24
- priestlinesses19
- priggishnesses24
- primogenitures24
- princelinesses23
- principalities25
- printabilities22
- procrastinates21
- productivities26
- professoriates20
- profoundnesses24
- prognosticates23
- prolificnesses25
- proportionates21
- proprietresses20
- prothonotaries20
- protohistories19
- protolanguages24
- protozoologies29
- provablenesses26
- provincializes35
- pseudonymities25
- pseudosciences26
- psychoanalyses28
- psychoanalyzes37
- psychoneuroses26
- psychrometries27
- punitivenesses24
- purblindnesses25
- pyrimethamines28
- pyrogenicities25
- pyrophosphates29
- quadrumvirates33
- quadruplicates33
- qualmishnesses31
- quasiparticles31
- questionnaires26
- quintuplicates33
- quizzicalities46
- radiobiologies21
- radioecologies21
- radiolucencies24
- radiotherapies20
- rationalnesses17
- ravenousnesses21
- reacclimatizes33
- reactivenesses22
- readablenesses20
- reappropriates23
- recalcitrances25
- recklessnesses23
- reconcentrates22
- reconsolidates20
- recontaminates22
- recrudescences26
- recrystallizes30
- reducibilities23
- reflectivities25
- refractivities24
- regressivities20
- rehospitalizes29
- reincorporates21
- reinvestigates21
- reliablenesses20
- remanufactures26
- rematerializes27
- removabilities25
- remythologizes33
- renationalizes26
- renewabilities22
- reorchestrates19
- republicanizes35
- reputabilities22
- reservednesses20
- resignednesses19
- resolutenesses17
- respirometries20
- resplendencies24
- restlessnesses16
- resystematizes28
- retiringnesses18
- retractilities18
- retrospectives24
- revolutionises21
- revolutionizes30
- rheumatologies23
- rhodochrosites22
- rightfulnesses24
- rigorousnesses18
- rootlessnesses16
- ruthlessnesses19
- saccharinities23
- salpiglossises21
- salutarinesses17
- sanguinenesses20
- scabrousnesses22
- schadenfreudes26
- scholasticates23
- scintigraphies25
- scornfulnesses24
- scratchinesses23
- scrupulosities23
- seamlessnesses19
- secludednesses22
- sedulousnesses19
- seismographies24
- selflessnesses20
- selfsamenesses22
- semidarknesses23
- sempiternities21
- sensiblenesses20
- sensitometries18
- sensuousnesses18
- separabilities21
- separatenesses18
- serviceberries24
- sesquiterpenes28
- severabilities22
- shadowgraphies27
- shamefulnesses25
- shareabilities20
- sheepishnesses22
- shellfisheries23
- shrewishnesses22
- significancies27
- simultaneities20
- sinisternesses16
- skillessnesses21
- skillfulnesses26
- skittishnesses21
- skullduggeries27
- slipperinesses22
- slothfulnesses23
- slovenlinesses22
- sluggardnesses22
- sluggishnesses23
- sluttishnesses19
- snappishnesses24
- sniffishnesses24
- snobbishnesses24
- sociablenesses22
- sociobiologies23
- solitarinesses16
- sonorousnesses17
- soothingnesses20
- soullessnesses18
- southernnesses19
- spaciousnesses22
- speciousnesses22
- spectrometries23
- spectroscopies26
- spermatophores25
- spermatophytes27
- spermiogeneses23
- spiritednesses19
- spiritualities19
- spitefulnesses23
- splendidnesses22
- splenectomizes34
- splenomegalies25
- sporotrichoses22
- sportfulnesses23
- sportivenesses22
- spotlessnesses19
- spuriousnesses20
- squarishnesses27
- stainabilities19
- stalwartnesses19
- stapedectomies24
- stealthinesses18
- steppingstones24
- stereographies21
- sterlingnesses19
- stonemasonries19
- straightnesses19
- strandednesses18
- stratigraphies21
- streptokinases22
- streptomycetes25
- structuralizes29
- stubbornnesses23