12 letters
- plasmodesmas23
- plasmogamies24
- plasmolyzing34
- plebeianisms23
- pleinairisms20
- pleochroisms24
- pleomorphism27
- pointillisms21
- polycentrism25
- polyglotisms24
- polyglottism24
- polymorphism29
- postorgasmic23
- pragmaticism26
- primitivisms25
- probabilisms25
- prognathisms23
- proselytisms21
- protoplasmic25
- psychologism28
- quislingisms29
- rationalisms17
- reassessment16
- reductionism21
- regionalisms19
- revisionisms20
- romanticisms22
- salesmanship22
- salvationism21
- sarcoplasmic25
- sardonicisms20
- scapegoatism23
- schismatical24
- schismatized30
- schismatizes29
- secessionism19
- sectarianism19
- sectionalism20
- seismicities18
- seismographs22
- seismography24
- seismologies18
- seismologist18
- seismometers18
- seismometric21
- silversmiths22
- smallclothes23
- smallholders21
- smallholding24
- smarminesses19
- smithsonites18
- smokescreens23
- smoothnesses18
- smorgasbords21
- smudginesses20
- smuttinesses17
- somnambulism27
- spasmolytics24
- spiritualism20
- standpattism20
- strabismuses19
- subjectivism35
- superorgasms21
- superrealism20
- suprematisms22
- survivalisms25
- sycophantism26
- symmetallism25
- synchronisms24
- syndactylism25
- syndicalisms23
- systematisms20
- tautomerisms19
- teetotalisms16
- theocentrism21
- tinsmithings21
- transmigrate18
- transmission17
- transmissive20
- transmittals17
- transmitters16
- transmitting19
- transmogrify23
- transmontane18
- transmutable21
- transvestism20
- triumphalism25
- ultraleftism21
- ultrarealism18
- unitarianism18
- universalism22
- uricotelisms20
- vagabondisms26
- vaginismuses23
- vanguardisms24
- vigilantisms23
- voluntarisms22
- voluntaryism24
- volunteerism22
- wordsmithery23
- workaholisms25
- xerophytisms29