13 letters
- photochromism29
- photocomposed28
- photocomposer27
- photocomposes27
- photocurrents23
- phytochemical32
- phytochemists28
- plantocracies24
- plastocyanins24
- plerocercoids24
- pococurantism27
- postdoctorate20
- postholocaust23
- preoccupation27
- preprocessing25
- preprocessors22
- prevocational25
- privatdocents25
- procarbazines32
- procathedrals23
- processionals21
- processioning23
- proclamations24
- proconsulates22
- proconsulship27
- procrastinate20
- proctological26
- proctologists22
- procuratorial21
- proprioceptor25
- provocatively30
- pseudoclassic25
- pyrocatechols27
- quattrocentos27
- radiochemical26
- radiochemists22
- rapprochement28
- ratiocinating20
- ratiocination18
- ratiocinative21
- ratiocinators17
- reallocations19
- reciprocating25
- reciprocation23
- reciprocative26
- reciprocators22
- reciprocities22
- reinoculating22
- reinoculation20
- reoccupations24
- reoccurrences24
- resocializing29
- reticulocytes23
- retrocessions17
- rhodochrosite21
- rockhoundings28
- sadomasochism25
- sadomasochist22
- selenocentric22
- shuttlecocked28
- sociabilities20
- socialization27
- sociocultural23
- socioeconomic26
- sociolinguist21
- spermatocytes24
- spirochetoses21
- spirochetosis21
- staphylococci30
- stockbreeders24
- stockbrokings30
- stockjobbings38
- stratocracies19
- stratocumulus23
- streptococcal26
- streptococcic28
- streptococcus26
- suballocation23
- subvocalizing37
- suffocatingly29
- synecdochical29
- technocracies25
- thalassocracy24
- thalassocrats19
- theocentrisms22
- thermochemist26
- thermocouples26
- translocating21
- translocation19
- trisoctahedra19
- tropocollagen24
- tubocurarines22
- turbochargers24
- undissociated20
- undoctrinaire20
- unequivocably38
- unequivocally36
- unsociability24
- velociraptors24
- videocassette21
- vocalizations31
- vocationalism25
- vocationalist22
- vociferations24