12 letters
- methylations21
- methysergide22
- microphysics28
- monophyletic27
- nonphysician25
- oceanography25
- pachysandras24
- paraldehydes22
- parathyroids20
- parenchymata26
- phanerophyte25
- phlebography30
- phreatophyte24
- phycocyanins29
- phycological29
- phycologists25
- phycomycetes30
- phylacteries23
- phyletically27
- phylloclades26
- phyllotactic27
- phyllotaxies28
- phylogenetic26
- physiatrists19
- physicalisms26
- physicalists23
- physicalness24
- physiocratic25
- physiognomic28
- physiography28
- physiologies22
- physiologist22
- phytoalexins28
- phytochemist27
- phytochromes27
- phytohormone25
- phytophagous27
- phytosterols20
- podophyllins26
- podophyllums29
- polarography25
- polyethylene24
- polyphyletic29
- polyrhythmic30
- porphyropsin26
- posthypnotic26
- praiseworthy22
- prophylactic29
- pteridophyte23
- pyrophyllite26
- rehydratable21
- rehydrations18
- rehypnotized30
- rehypnotizes29
- rhythmically28
- scintigraphy25
- sclerenchyma27
- seismography24
- shadowgraphy27
- sphygmograph31
- staphylinids22
- stereography21
- stratigraphy21
- tachycardias23
- tetrahymenas20
- thallophytes23
- thallophytic26
- theophylline24
- thermography26
- thymectomies25
- thymectomize34
- thyrotrophic24
- thyrotrophin22
- thyrotropins20
- tracheophyte24
- unhydrolyzed32
- unhyphenated25
- unhysterical22
- unnewsworthy25
- vichyssoises23
- xanthophylls31
- xerophytisms29
- zoogeography32
- zygapophyses35
- zygapophysis35