10 letters
- hylozoists24
- hyperboles21
- hyperbolic24
- hypergolic23
- hypersonic21
- hypertexts24
- hypertonic21
- hypnotists18
- hypocenter21
- hypocorism23
- hypocotyls23
- hypocrites20
- hypostases17
- hypostasis17
- hypostatic20
- hypostomes20
- hypostyles20
- hypotheses19
- hypothesis19
- hypsometer20
- hystereses14
- hysteresis14
- hysteretic17
- hysterical18
- ideologies14
- ideologist14
- illiteracy17
- illiterate12
- impolitely20
- inspectors17
- instillers13
- intellects16
- intercepts17
- interlopes15
- interposes14
- intersects14
- interstice14
- intertills13
- introspect17
- ionophores16
- ionosphere16
- isentropic17
- isochrones16
- isoglossal14
- isoglosses13
- isoglossic16
- isometrics16
- isometries13
- isomorphic21
- isopiestic16
- isoplethic19
- isopropyls19
- isospories13
- isotropies13
- jocosities22
- kiloliters16
- larghettos15
- lathyritic18
- lectotypes19
- legalistic17
- legalities14
- legateship18
- legerities13
- legislates14
- legislator14
- leistering14
- lengthiest16
- lepidolite16
- leptosomes17
- leptospire17
- lethargies15
- letterings14
- lexicology26
- lifestyles17
- lighteners16
- lightproof21
- lightships20
- limelights19
- limitrophe19
- lipotropic20
- listlessly15
- literacies14
- literalist12
- literality14
- literately14
- lithologic19
- lithophyte20
- lithopones17
- litigators13
- littleness13
- liturgists14
- localities15
- locutories15
- logicality19
- loginesses14
- logistical17
- logogriphs20
- logorrheic18
- logotypies18
- loincloths18
- loopholing20
- lorgnettes14
- lusterless13
- lyophilise19
- lyophilize28
- lysimeters16
- lysimetric19
- lysogenies16
- lysogenise16
- meliorists14
- mephitises18
- mesophylls22
- mesophytes20
- mesophytic23
- meteoritic16
- metritises13
- metropolis17
- microliths19
- microphyll25
- micropyles22
- millerites15
- misologies16
- missileers14
- missiology18
- mistletoes14
- morosities13
- morphology23
- motherless16
- mycologies21
- mycologist21
- mycophiles24
- myositises15
- myosotises15
- mythologer20
- mythologic23
- mythopoeic23
- necropoles18
- necropolis18
- necropsies17
- neotropics17
- nephrology21
- nephrotics19
- nepotistic17
- nightscope21
- nightspots18
- noospheres16
- nosologies14
- obsolesces17
- obsoletely17
- obstetrics16
- octillions16
- octoploids18
- octothorps18
- oecologies16
- oenologies14
- oenophiles17
- oilinesses12
- oinologies14
- oleographs18
- oleoresins12
- oligoclase17
- oligomeric19
- oligopsony19
- oncologies17
- oncologist17
- ontologies14
- ontologist14
- operettist13
- opposeless17
- oppositely19
- optometric19
- orchitises15
- orismology18
- ornithoses13
- ornithosis13
- orogenesis13
- orogenetic16
- orphically22
- orthoclase16
- orthoepies15
- orthoepist15
- orthopedic19
- orthotists12
- oscillates15
- oscillator15
- osteitides11
- osteoclast14
- osteocytes15
- osteogenic16
- osteopaths15
- osteopathy17
- osteosises10
- ostracises13
- otherguess15
- otioseness11
- otiosities10
- otoscopies16
- outcrosses14
- outgrosses13
- outpitches19