12 letters
- isomorphisms23
- kymographies28
- leptocephali25
- lexicography32
- lithographed23
- lithographer22
- lithographic25
- lithospheres20
- lithospheric23
- luteotrophic22
- luteotrophin20
- lymphoblasts27
- lymphography32
- lymphomatous27
- lyophilising24
- lyophilizers30
- lyophilizing33
- magnetograph25
- mammographic31
- melanophores22
- mesencephala25
- mesomorphies23
- mesophyllous25
- metallophone23
- metamorphism26
- metamorphose23
- metaphorical24
- metaphysical26
- metencephala25
- microcephaly29
- micrographed26
- micrographic28
- microphonics27
- microphysics28
- microspheres23
- mimeographed26
- misemphasize32
- monadelphous24
- monographing26
- monomorphism27
- monophthongs26
- monophyletic27
- morphallaxes29
- morphallaxis29
- morphologies23
- morphologist23
- morphometric26
- mycophagists27
- myrmecophile29
- mythographer26
- naphthalenes22
- necrophagous24
- necrophiliac25
- necrophilias22
- necrophilism25
- negrophobias23
- nephelinites20
- nephelinitic23
- nephelometer22
- nephelometry24
- nephrologies21
- nephrologist21
- nephropathic26
- nephrostomes21
- neutrophilic23
- nomographies23
- nonphosphate24
- nonphysician25
- nonspherical23
- nucleophiles24
- nucleophilic27
- nympholeptic30
- nymphomaniac30
- nymphomanias27
- oceanography25
- oligophagies22
- oligophagous23
- oligotrophic23
- onychophoran26
- oophorectomy25
- orographical23
- oropharynges22
- oropharynxes27
- orthographic24
- oscillograph24
- overemphases24
- overemphasis24
- overemphatic27
- ozonospheres27
- paedomorphic27
- paleographer23
- paleographic26
- pamphleteers24
- pantographic26
- paragraphers22
- paragraphing25
- paraphrasers20
- paraphrasing23
- paraphrastic23
- paratyphoids23
- peripherally24
- periphrastic23
- perphenazine31
- petrographer22
- petrographic25
- phagocytized34
- phagocytizes33
- phagocytosed25
- phagocytoses24
- phagocytosis24
- phagocytotic27
- phanerophyte25
- pharmacology28
- pharmacopeia26
- phenanthrene22
- pheneticists21
- phenocrystic26
- phenological25
- phenomenally26
- phenotypical27
- phentolamine23
- philadelphus26
- philanderers20
- philandering23
- philanthropy26
- philatelists19
- philharmonic27
- philhellenes23
- philhellenic26
- philistinism22
- phillumenist24
- philodendron22
- philological25
- philologists21
- philosophers23
- philosophies23
- philosophise23
- philosophize32
- phlebography30
- phlebologies24
- phlebotomies24
- phlebotomist24
- phonemically28
- phonemicists24
- phonetically25
- phoneticians22
- phonogrammic29
- phonographer25
- phonographic28
- phonological25
- phonologists21
- phonotactics24
- phosphatases22
- phosphatides23
- phosphatidic26
- phosphatidyl26
- phosphatized32
- phosphatizes31
- phosphaturia23
- phospholipid27
- phosphoniums27
- phosphoresce25
- phosphorites22
- phosphoritic25
- phosphoruses23
- photobiology25
- photocathode23
- photochemist25
- photochromic28
- photocompose26
- photocopiers23
- photocopying28
- photocurrent22
- photodynamic27
- photoengrave24
- photoexcited28
- photoflashes23
- photogeology24
- photographed25
- photographer24
- photographic27
- photogravure24
- photoinduced24
- photoionized28
- photoionizes27
- photokineses22
- photokinesis22
- photokinetic25
- photolyzable33
- photomapping29
- photometries20
- photomontage23
- photomosaics23
- photonuclear23
- photooxidize34
- photoperiods21
- photophobias25
- photopolymer26
- photoproduct25
- photoreduced23