13 letters
- hellenization28
- hemagglutinin26
- herringboning25
- heterophonies21
- hexamethonium32
- hominizations29
- housecleaning24
- housetraining20
- humanitarians21
- humanizations30
- hyaluronidase21
- hyperimmunize37
- hypersalinity24
- hypertonicity26
- hyperurbanism28
- ignominiously24
- illusionistic20
- immunizations31
- impecuniosity26
- impecuniously28
- importunities21
- impressionism23
- impressionist20
- inanimateness19
- incarnadining23
- incognizances33
- incommunicado29
- inconvenience27
- inconveniency29
- indeterminism22
- indeterminist19
- indiscernible23
- infinitesimal22
- inflationisms22
- inflationists19
- ingeniousness19
- initialnesses16
- inorganically24
- insanitations16
- insignificant24
- interchaining23
- intercolonial20
- interdominion20
- interknitting22
- intuitionisms19
- intuitionists16
- irreligionist17
- isoagglutinin21
- isoelectronic21
- isolationisms18
- isolationists15
- isotonicities17
- kinnikinnicks32
- kittenishness21
- kleptomaniacs28
- knickerbocker35
- latinizations25
- leishmaniases20
- leishmaniasis20
- leprechaunish26
- liberationist18
- lignification24
- longanimities21
- luteinization26
- lymphadenitis26
- magnanimities23
- magnanimously27
- magnification26
- magnificences29
- magnificently29
- magniloquence34
- maladminister22
- manifestation21
- manipulatable26
- manipulations23
- mannishnesses21
- masculinising25
- masculinities22
- masculinizing34
- matrimonially24
- meaninglessly24
- mechanization32
- megalomaniacs26
- melanizations28
- meningococcal30
- meningococcic32
- meningococcus30
- metronidazole28
- microorganism25
- microtechnics28
- millennialism24
- millennialist21
- miniaturistic21
- miniaturizing30
- minicomputers27
- minimizations30
- ministerially21
- ministrations18
- miscaptioning26
- miscellanists22
- modernisation19
- modernization28
- monogenically27
- monopsonistic24
- monotonically25
- municipalized35
- municipalizes34
- mutagenically27
- neuraminidase20
- neurasthenias18
- neurasthenics21
- nickeliferous26
- nicotinamides22
- nidifications22
- niggardliness21
- nightclubbers29
- nightclubbing32
- nightmarishly26
- nincompoopery29
- nitrification21
- nitrobenzenes28
- nitroglycerin23
- nitromethanes20
- nitroparaffin24
- nonallergenic23
- nonchauvinist26
- noncommunists26
- nonelectronic23
- nonhappenings27
- nonidentities17
- nonimmigrants24
- noninclusions22
- nonincreasing22
- nonincumbents27
- nonindigenous21
- nonindividual24
- nonindustrial19
- noninfectious23
- noninfluences25
- noninsurances21
- nonintegrated19
- nonintoxicant27
- nonirradiated17
- nonirritating18
- nonmeaningful27
- nonmechanical28
- nonpathogenic26
- nonuniformity25
- nonuniqueness28
- nonuniversals22
- nonuniversity23
- nutritionists16
- nymphomaniacs31
- omnicompetent27
- omnipresences24
- operationisms20
- operationists17
- opinionatedly22
- opportunistic24
- opportunities21
- oppositionist20
- organisations17
- organizations26
- ornithischian22
- ornithologies19
- ornithologist19
- outbargaining23
- outmanipulate23
- outorganizing29
- overburdening26
- overdesigning24
- overgoverning27
- overingenious22
- overorganized30
- overorganizes29
- overstraining21
- overweeningly27
- paleobotanies21
- paleobotanist21
- pancytopenias26
- panleukopenia27
- pantechnicons27
- parkinsonisms25
- partitionists17
- pathogenicity26
- pathognomonic28
- patronization27
- patronizingly32
- pedestrianism21
- penicillamine26
- penicillinase23
- penitentially22
- percussionist21
- perfectionism26
- perfectionist23
- perfusionists21
- peritonitises17
- phenylalanine25
- philharmonics28
- philhellenism27