14 letters
- heteroploidies21
- heterosexually28
- heterothallism23
- heterotrophies21
- heterozygosity31
- hieroglyphical30
- homoeroticisms25
- humorousnesses22
- hyaluronidases22
- hydrobiologies25
- hydrobiologist25
- hydrocephalics31
- hydrocephalies28
- hydrochlorides26
- hydrocolloidal26
- hydrocortisone23
- hydrocrackings32
- hydrodynamical30
- hydrogenations23
- hydrologically29
- hydrolytically29
- hydromechanics31
- hydroperoxides30
- hydrophilicity30
- hydrophobicity32
- hydroponically30
- hydrotherapies24
- hydrothermally28
- hydroxyapatite31
- hydroxylamines33
- hydroxylations30
- hydroxyproline33
- hygroscopicity31
- hypermetropias27
- hyperproducers29
- hypertrophying31
- hypothyroidism29
- iatrogenically24
- idolatrousness18
- impropernesses24
- improvisations25
- improvisatores24
- inapproachable30
- incontrollable25
- indecorousness21
- interelectrode20
- interferograms23
- interferometer21
- interferometry23
- interobservers22
- interoperative22
- interparochial24
- interrogations18
- interrogatives21
- introductorily23
- introgressants18
- introgressions18
- introspections22
- introversively26
- ironicalnesses20
- irreproachable26
- irreproachably28
- irreproducible26
- isentropically25
- isochromosomes25
- isoproterenols19
- laparoscopists24
- leukodystrophy30
- lustrousnesses18
- macroaggregate26
- macroeconomics30
- macroevolution27
- macroglobulins29
- macromolecular29
- macromolecules29
- macronucleuses27
- macronutrients23
- macrostructure25
- malodorousness21
- martyrologists22
- megasporophyll31
- meteorological24
- meteorologists20
- metronidazoles29
- metronomically28
- microanatomies24
- microbarograph30
- microbiologies26
- microbiologist26
- microbreweries26
- microcassettes23
- microcephalics32
- microcephalies29
- microcircuitry29
- microcomputers30
- microeconomics30
- microelectrode25
- microevolution27
- microfibrillar28
- microfilaments28
- microgravities26
- microinjecting36
- microinjection34
- micrometeorite23
- micrometeoroid24
- microminiature25
- micronucleuses27
- micronutrients23
- microorganisms26
- microparticles27
- microplanktons30
- microprocessor26
- microprojector35
- micropublisher30
- micropulsation26
- micropunctures29
- microspherical29
- microsporangia26
- microsporocyte28
- microstructure25
- microsurgeries23
- microtechnique36
- milliroentgens23
- misappropriate26
- misprogramming31
- mispronouncing29
- monochromatism29
- monochromators26
- monopropellant27
- multielectrode24
- multiprocessor25
- narrowcastings24
- nephrotoxicity32
- neuroanatomies20
- neuroanatomist20
- neurobiologies22
- neurobiologist22
- neuroblastomas23
- neurochemicals28
- neurochemistry26
- neuroendocrine22
- neurofibromata25
- neurogenically26
- neurologically26
- neuropathology26
- neuroradiology22
- neuroscientist20
- neurosecretion20
- neurosecretory21
- neurosurgeries19
- nitrocellulose22
- nitroglycerine24
- nitroglycerins24
- nitroparaffins25
- nonchromosomal28
- noncontrolling25
- nonelectrolyte23
- nonelectronics24
- nonhygroscopic31
- nonnitrogenous21
- nonprogrammers27
- nonprogressive25
- nonproprietary24
- nonreciprocals26
- nonretroactive23
- nonsynchronous26
- norethindrones20
- nucleoproteins24
- numerousnesses21
- obstreperously24
- optoelectronic25
- orthochromatic27
- outreproducing26
- overcontrolled25
- overgenerosity23
- overgenerously25
- overoptimistic27
- overorganizing33
- overornamented24
- overprocessing27
- overproduction27
- overprograming29
- overprogrammed30
- overproportion25
- overprotecting27
- overprotection25
- overprotective28
- oxymoronically34
- pararosaniline20
- patronizations28
- petrochemicals29
- petrochemistry27
- petrographical28
- petrologically27
- philanthropies26
- philanthropist26
- philanthropoid27
- phosphoprotein28
- phosphorolyses27
- phosphorolysis27