13 letters
- introgressant17
- introgression17
- introgressive20
- kinesiologies21
- lactoglobulin26
- laryngologies22
- lexicographer31
- lexicographic34
- lexicologists27
- lichenologies23
- lichenologist23
- lithographers23
- lithographies23
- lithographing26
- logicalnesses21
- logogrammatic27
- lymphographic34
- macroglobulin28
- magnetographs26
- malacological27
- malacologists23
- malariologies20
- malariologist20
- mammographies29
- martyrologies21
- martyrologist21
- melanogeneses21
- melanogenesis21
- metallography27
- meteorologies19
- meteorologist19
- methemoglobin28
- methodologies22
- methodologist22
- microbiologic28
- micrographics29
- micrographing29
- microprograms27
- mimeographing29
- mineralogical24
- mineralogists20
- miscataloging25
- misprograming27
- misprogrammed28
- monogenically27
- monoglyceride26
- monogrammatic28
- morphogeneses24
- morphogenesis24
- morphogenetic27
- morphological28
- morphologists24
- musicological27
- musicologists23
- mycologically31
- myrmecologies27
- myrmecologist27
- mythographers27
- mythographies27
- mythologizers32
- mythologizing35
- narratologies17
- narratologist17
- nematological24
- nematologists20
- neonatologies18
- neonatologist18
- nephrologists22
- nitroglycerin23
- nonbiological25
- nonbiologists21
- noncarcinogen25
- nonhomologous24
- nonmonogamous25
- nonpathogenic26
- nonprogrammer26
- nosologically24
- numerological25
- numerologists21
- oceanographer24
- oceanographic27
- oceanologists20
- octogenarians20
- odontoglossum22
- onomatologies20
- onomatologist20
- ontologically24
- ophthalmology29
- organogeneses19
- organogenesis19
- organogenetic22
- orismological23
- ornithologies19
- ornithologist19
- orthogonality21
- orthogonalize28
- orthographies22
- oscillographs25
- oscillography27
- overprogramed26
- oxyhemoglobin34
- paleobiologic26
- paleoecologic26
- paleographers24
- paleographies24
- paleontologic24
- palynological27
- palynologists23
- papyrologists24
- parallelogram24
- parasitologic22
- pathogenicity26
- pathognomonic28
- pedagogically28
- peptidoglycan29
- petrographers23
- petrographies23
- pettifoggings26
- pharmacognosy29
- pharmacologic30
- phenomenology28
- phlebographic32
- phonographers26
- phonographies26
- photobiologic27
- photogeologic26
- photographers25
- photographies25
- photographing28
- photogravures25
- phraseologies21
- phraseologist21
- phrenological26
- phrenologists22
- physiognomies26
- physiographer27
- physiographic30
- physiological27
- physiologists23
- phytopathogen28
- pictographies26
- planetologies21
- planetologist21
- planographies25
- plethysmogram29
- pogonophorans25
- polarographic27
- pornographers24
- pornographies24
- praxeological30
- prebiological26
- precognitions23
- preprograming27
- preprogrammed28
- primatologies22
- primatologist22
- primogenitors22
- primogeniture23
- proctological26
- proctologists22
- progesterones19
- progestogenic24
- prognosticate22
- programmables28
- progressional20
- progressively25
- progressivism25
- progressivist22
- progressivity24
- prosopography28
- proteoglycans25
- protogalaxies26
- psephological28
- psephologists24
- psychobiology31
- psychogeneses26
- psychogenesis26
- psychogenetic29
- psychological30
- psychologised27
- psychologises26
- psychologisms29
- psychologists26
- psychologized36
- psychologizes35
- pteridologies20
- pteridologist20
- radiobiologic23
- radiographies21
- radiographing24
- rechoreograph25
- recognizances32
- reflexologies27
- remythologize32
- rephotographs25
- reprogramming27
- reprographers23
- reprographics26
- reprographies23
- retrogressing18