11 letters
- proteolytic20
- prothoraces19
- prothoracic22
- protomartyr19
- protonemata18
- protopathic22
- protractile18
- protraction18
- protractive21
- psychodrama25
- pterodactyl21
- pyramidical24
- pyrethroids19
- pyrometries19
- pyrrhotites18
- radicalized26
- radioactive19
- radiography21
- radiometers15
- radiometric18
- radiotracer15
- ratiocinate15
- reactionary17
- reactivated19
- reauthorize23
- receptivity23
- reciprocate20
- reciprocity22
- recommitted21
- recordation16
- recriminate18
- redecorated16
- redecorator15
- redirection16
- reformatted18
- rehydration17
- rehypnotize28
- reiteration12
- remediation16
- remotivated19
- reoperation15
- repartition15
- repatriated15
- repatriates14
- repolarized25
- reprimanded20
- reprivatize27
- reradiation13
- retaliatory14
- retardation13
- retinopathy19
- retroaction15
- retroactive18
- retrodicted16
- rhapsodized27
- rhetorician17
- rhizoctonia26
- rhizotomies25
- ricochetted20
- rodenticide17
- romanticize27
- schematized29
- secretariat14
- spermatheca22
- spermatozoa26
- spirochaete19
- spirometric20
- steatorrhea13
- stereotypic19
- sympathetic24
- sympathized31
- sympathizer30
- tachometers19
- temporality20
- temporalize27
- temporaries17
- temporarily20
- temporizers26
- termitaries14
- tetrachords17
- tetradrachm20
- tetrahedral15
- tetrahedron15
- tetrahymena19
- tetraploidy18
- tetrarchies16
- tetrasporic17
- thalidomide19
- theorematic19
- theoretical17
- therapeutic20
- thermalized27
- thermoduric21
- thermometry21
- thermoscope22
- thiocyanate19
- thixotropic26
- thoracotomy21
- thrombocyte24
- thyrotropic21
- thyrotropin19
- tomographic24
- tracheotomy21
- trademarked20
- tragicomedy22
- trapezoidal25
- trapshooter16
- traumatized25
- trepidation16
- treponemata18
- triceratops17
- trichomonad21
- trichromats19
- triplicated19
- trophozoite25
- tropicalize27
- tyrothricin19
- urochordate18
- warmhearted20
- xerothermic26
- zygomorphic35