13 letters
- microcapsules27
- microclimates26
- microcosmoses25
- microcultures25
- microfunguses27
- micropipettes25
- microswitches27
- mifepristones23
- mindfulnesses24
- misadventures23
- misanthropies22
- misattributes20
- miscalculates25
- miscibilities23
- misclassifies23
- misemphasizes33
- miserlinesses18
- misidentifies21
- misknowledges28
- mispronounces25
- misreferences23
- mistranslates18
- molluscicides26
- mononucleoses23
- monosyllables25
- monstrosities17
- moribundities22
- morphogeneses24
- morphometries24
- mountainsides20
- movablenesses25
- multivalences27
- mundanenesses21
- municipalizes34
- muscularities22
- myelofibroses25
- myocarditises22
- myrmecologies27
- myrmecophiles30
- mythographies27
- narratologies17
- nasopharynges24
- nasopharynxes29
- nationalities16
- naturalnesses17
- naturopathies20
- naughtinesses20
- neckerchieves30
- needfulnesses21
- neonatologies18
- nephrectomies25
- nephropathies24
- nervousnesses20
- neurohormones21
- neuropeptides22
- neurosciences22
- neutralnesses17
- newsmagazines32
- nicotinamides22
- nitrobenzenes28
- nitromethanes20
- noisomenesses18
- nomenclatures23
- noncandidates21
- nondeliveries21
- noneffectives28
- nonexecutives30
- nonexistences26
- nonexplosives30
- nonidentities17
- noninfluences25
- noninsurances21
- nonmotilities19
- nonnarratives20
- nonphosphates25
- nonresidences20
- nonvalidities21
- normotensives22
- notablenesses19
- nothingnesses20
- notionalities16
- noxiousnesses23
- nucleotidases20
- nympholepsies28
- objectivities32
- obliquenesses28
- obscurenesses21
- observatories20
- obsolescences24
- obviousnesses22
- octosyllables24
- odorousnesses16
- ominousnesses19
- omnipresences24
- oneiromancies21
- onerousnesses16
- ongoingnesses20
- onomatologies20
- openabilities21
- operabilities20
- operosenesses17
- opportunities21
- optionalities18
- oracularities18
- orderlinesses16
- organogeneses19
- originalities17
- ornithologies19
- orthographies22
- oscilloscopes24
- osteoplasties17
- ototoxicities23
- outreproduces22
- outwardnesses19
- ovariectomies23
- overanxieties25
- overdecorates21
- overestimates20
- overexercises27
- overexposures28
- overidealizes28
- overimpresses23
- overissuances22
- overmedicates24
- overnourishes21
- overorganizes29
- overpersuades22
- overpopulates25
- overpressures21
- overprocesses23
- overregulates21
- overreliances22
- oversaturates18
- overstretches22
- oxaloacetates24
- packabilities27
- packinghouses29
- painfulnesses23
- paleobotanies21
- paleographies24
- palpabilities24
- pantothenates20
- papovaviruses28
- paralanguages23
- parameterizes28
- paramountcies24
- parasiticides20
- parasyntheses21
- parathormones22
- parenthesizes28
- parfocalities23
- partibilities20
- passivenesses21
- patriarchates21
- paunchinesses24
- pearlescences24
- peculiarities21
- peevishnesses23
- pennywhistles26
- pensivenesses22
- pentapeptides24
- pentaploidies22
- peppergrasses24
- pepperinesses23
- peradventures23
- perfectnesses23
- performatives26
- periodicities20
- periostitises16
- peritonitises17
- permanganates23
- perphenazines32
- perseverances24
- persistencies20
- personalities18
- perspicuities23
- pertinacities20
- petrographies23
- pettishnesses19
- phalansteries20
- phanerophytes26
- pharyngitides24
- phenanthrenes23
- phentolamines24
- philosophises24
- philosophizes33
- phonographies26
- phosphoresces26
- photocathodes24
- photocomposes27
- photoengraves25
- photographies25
- photogravures25
- photomontages24
- photooxidizes35
- phraseologies21
- phreatophytes25
- physicalities24
- physiognomies26
- phytohormones26