13 letters
- helminthology27
- hematological25
- hematologists21
- herpetologies21
- herpetologist21
- holidaymakers26
- homeschoolers24
- homeschooling27
- homologations22
- homologically28
- homopolymeric30
- hydrocolloids24
- hyperbolizing36
- hyperboloidal26
- hyperpolarize33
- ichthyologies25
- ichthyologist25
- ideologically24
- immunological28
- immunologists24
- impolitically27
- insolubilized30
- insolubilizes29
- insolubleness21
- intercolonial20
- interinvolved25
- interinvolves24
- interpolating21
- interpolation19
- interpolative22
- interpolators18
- inviolability25
- inviolateness20
- involuntarily24
- irresolutions16
- isolationisms18
- isolationists15
- isoproterenol18
- jollification31
- kinesiologies21
- laryngologies22
- lexicologists27
- lichenologies23
- lichenologist23
- lollapaloozas29
- lysolecithins23
- machicolation26
- macromolecule28
- malacological27
- malacologists23
- malariologies20
- malariologist20
- martyrologies21
- martyrologist21
- megalopolises23
- megalopolitan24
- melancholiacs27
- metabolically27
- metabolizable33
- meteorologies19
- meteorologist19
- methodologies22
- methodologist22
- metronidazole28
- metropolitans21
- microbiologic28
- mollification25
- molluscicidal27
- molluscicides26
- mollycoddlers26
- mollycoddling29
- monomolecular26
- morphological28
- morphologists24
- multipolarity24
- musicological27
- musicologists23
- mycologically31
- myrmecologies27
- myrmecologist27
- mythologizers32
- mythologizing35
- narratologies17
- narratologist17
- nematological24
- nematologists20
- neoliberalism22
- neonatologies18
- neonatologist18
- nephrologists22
- nonalcoholics25
- nonbiological25
- nonbiologists21
- noncollectors23
- noncollegiate22
- noncontrolled22
- nonhomologous24
- nonpetroleums23
- nonpolitician23
- nosologically24
- numerological25
- numerologists21
- nympholepsies28
- obsolescences24
- obsolescently24
- oceanologists20
- officeholders26
- oleandomycins25
- oleomargarine20
- olfactometers23
- oligopolistic23
- onomatologies20
- onomatologist20
- ontologically24
- ophthalmology29
- orismological23
- ornithologies19
- ornithologist19
- outpoliticked26
- overwithholds26
- paleobiologic26
- paleoecologic26
- paleontologic24
- palynological27
- palynologists23
- papyrologists24
- parabolically27
- parasitologic22
- pharmacologic30
- phenomenology28
- phentolamines24
- phospholipase27
- phospholipids28
- photobiologic27
- photogeologic26
- photopolymers27
- photovoltaics26
- phraseologies21
- phraseologist21
- phrenological26
- phrenologists22
- physiological27
- physiologists23
- planetologies21
- planetologist21
- pneumatolytic27
- podsolization28
- podzolization37
- polarimetries20
- polarizations27
- polarographic27
- policyholders26
- poliomyelitis23
- politicalized31
- politicalizes30
- poltrooneries18
- polybutadiene25
- polycarbonate26
- polycentrisms26
- polychotomies27
- polychotomous28
- polychromatic30
- polycistronic26
- polycythemias29
- polydactylies26
- polyembryonic31
- polyethylenes25
- polyglottisms25
- polygraphists26
- polymorphisms30
- polyphonously29
- polypropylene29
- polyribosomal26
- polyribosomes25
- polysyllables27
- polysyndetons24
- polyurethanes23
- postholocaust23
- postisolation18
- praxeological30
- preadolescent22
- prebiological26
- precollegiate23
- prednisolones20
- preenrollment23
- pregnenolones22
- prerevolution23
- primatologies22
- primatologist22
- proctological26
- proctologists22
- prolegomenous24
- proleptically27
- proliferating23
- proliferation21
- proliferative24
- prolificacies26
- prolificities23
- prolongations21
- protolanguage23