14 letters
- metempsychoses30
- meticulosities22
- metronidazoles29
- microanatomies24
- microbiologies26
- microbreweries26
- microcassettes23
- microcephalies29
- microgravities26
- micronucleuses27
- microparticles27
- micropunctures29
- microsurgeries23
- militantnesses20
- mindlessnesses21
- mirthfulnesses25
- misarticulates22
- mistranscribes24
- mitogenicities23
- moderatenesses19
- modulabilities24
- monoglycerides27
- monotonicities22
- monumentalizes33
- motherlinesses21
- mournfulnesses25
- movelessnesses23
- mulligatawnies26
- multiformities25
- multiplicities26
- multiversities23
- municipalities26
- mutagenicities24
- mutinousnesses21
- namelessnesses20
- naphthylamines29
- nauseousnesses18
- navigabilities25
- nebulousnesses22
- needlessnesses18
- negativenesses22
- neoorthodoxies25
- nephelometries24
- nephrectomizes35
- neuraminidases21
- neuroanatomies20
- neurobiologies22
- neurosurgeries19
- nonacceptances29
- nonappearances26
- nonattendances22
- noncandidacies25
- noncelebrities23
- noncommunities27
- noncompliances30
- nonconferences27
- nonconfidences28
- nondegenerates20
- nondegradables24
- nonderivatives25
- nondisclosures22
- nonemergencies25
- nonforfeitures23
- nonlinearities18
- nonnecessities20
- nonobservances27
- nonoccurrences27
- nonperishables25
- nonrecyclables29
- nonresidencies21
- nonresistances20
- nonreturnables22
- nonsecretories19
- noradrenalines19
- norethindrones20
- nortriptylines22
- numerousnesses21
- numinousnesses22
- obduratenesses20
- obligingnesses24
- obsoletenesses19
- occidentalizes32
- oceanographies25
- oleomargarines21
- omphaloskepses30
- onchocerciases26
- oncogenicities24
- oncornaviruses24
- oophorectomies25
- opposabilities24
- oppositenesses21
- ordinarinesses17
- orthogonalizes29
- outdatednesses18
- outgoingnesses21
- outmanipulates24
- outsidernesses17
- overabundances28
- overactivities25
- overadvertises23
- overcapacities27
- overclassifies25
- overcompresses27
- overdominances27
- overdramatizes31
- overelaborates22
- overemphasizes35
- overencourages25
- overfertilizes31
- overglamorizes33
- overidentifies23
- overmaturities22
- overprescribes27
- oversimplifies28
- overspeculates26
- overstimulates23
- oversubscribes28
- paedomorphoses26
- painlessnesses20
- palatabilities22
- palatialnesses20
- paleobiologies24
- paleoecologies24
- paleontologies22
- paleozoologies30
- pancreatitides22
- pansexualities27
- pantisocracies24
- parasitologies20
- particularises22
- particularizes31
- passementeries21
- pastoralnesses19
- pathlessnesses21
- pathobiologies25
- peacefulnesses26
- penicillamines27
- penicillinases24
- penitentiaries19
- perceptivities27
- perfectivities27
- pericarditides22
- perilousnesses20
- permeabilities24
- permittivities24
- perspicacities26
- perversenesses22
- perviousnesses23
- pettifoggeries24
- pharmacologies28
- phencyclidines31
- phenmetrazines33
- phenothiazines32
- phenylalanines26
- phenylephrines29
- philadelphuses28
- philanthropies26
- phlebographies30
- phosphokinases29
- phospholipases28
- phosphorolyses27
- phosphorylases27
- phosphorylates27
- photobiologies25
- photogeologies24
- photosynthates24
- photosyntheses24
- physicalnesses26
- physiographies28
- physostigmines27
- picornaviruses26
- pinealectomies25
- pitiablenesses22
- pitilessnesses19
- planlessnesses21
- plasmaphereses26
- plastoquinones30
- platitudinizes30
- plausibilities23
- pleasantnesses20
- pleasingnesses22
- plotlessnesses20
- pneumaticities25
- pneumatologies25
- pneumatophores27
- pneumoconioses26
- pneumothoraces27
- pneumothoraxes31
- poeticalnesses22
- polarographies25
- polybutadienes26
- polycarbonates27
- polyembryonies29
- polyneuritides23
- polyneuritises22
- polypropylenes30
- polytonalities22
- populousnesses24
- positivenesses22
- postdebutantes23