13 letters
- polychromatic30
- polycistronic26
- polycythemias29
- polydactylies26
- polyembryonic31
- polyethylenes25
- polyglottisms25
- polygraphists26
- polymorphisms30
- polyphonously29
- polypropylene29
- polyribosomal26
- polyribosomes25
- polysyllables27
- polysyndetons24
- polyurethanes23
- pompousnesses24
- ponderousness20
- pontificating26
- pontification24
- pontificators23
- porcelainized31
- porcelainizes30
- porcelainlike26
- porcellaneous23
- pornographers24
- pornographies24
- porphyropsins27
- portabilities20
- possessedness18
- possibilities20
- postbourgeois22
- postclassical24
- postcranially24
- postdebutante22
- postdiluvians24
- postdoctorate20
- postembryonal26
- postembryonic28
- postemergence25
- postemergency27
- postepileptic26
- postfractures23
- postgraduates20
- postholocaust23
- postinaugural22
- postinfection24
- postinjection30
- postisolation18
- postlapsarian21
- postmodernism24
- postmodernist21
- postoperative23
- postponements24
- postpositions20
- postpubescent27
- postrecession20
- postsecondary23
- posttensioned19
- posttraumatic23
- posttreatment20
- postulational20
- postvasectomy28
- potablenesses21
- potentiations18
- potentiometer20
- powerlessness21
- preponderance25
- preponderancy27
- preponderated22
- preponderates21
- preportioning23
- prepositional21
- prepositively26
- prepossessing22
- prepossession20
- proportionals21
- proportionate20
- proportioning23
- propositional21
- propositioned21
- propoxyphenes34
- prosopography28
- prosopopoeias22
- purposelessly24
- purposiveness25
- reappointment24
- reapportioned21
- recomposition23
- redisposition18
- reexportation24
- reimportation20
- reimpositions20
- reincorporate20
- repopularized31
- repopularizes30
- repopulations22
- reportorially20
- reposefulness22
- repositioning20
- repossessions17
- semipolitical24
- semiporcelain24
- spokesmanship29
- spokespersons24
- spondylitises21
- spontaneities18
- spontaneously22
- sporopollenin23
- sportfishings24
- sportscasters19
- sportscasting22
- sportsmanlike25
- sportsmanship25
- sportswriters19
- sportswriting22
- subcomponents28
- subpopulation26
- superimposing26
- superposition21
- superpowerful28
- suppositional22
- suppositories20
- tablespoonful26
- teleportation18
- teleutospores18
- temporalities20
- temporalizing32
- temporariness20
- temporization29
- topographical27
- topologically26
- totipotencies20
- trampolinings24
- trampolinists21
- transportable21
- transposition18
- tropocollagen24
- typographical29
- typologically28
- ultrapowerful26
- unapologizing33
- underexposing29
- underexposure27
- underreported20
- unimportances25
- unsupportable26
- urediniospore19
- valpolicellas27
- vaporizations30
- whippoorwills29
- zoosporangium32