10 letters
- homophobic26
- homophones21
- homophonic24
- homosocial19
- hormogonia18
- horologies15
- horologist15
- horoscopes18
- horsehairs14
- horselaugh18
- horseplays18
- horsetails13
- horsewhips20
- housecarls17
- houserooms16
- hyaloplasm22
- hydrolases16
- hydrologic21
- hydropsies18
- hydrosolic19
- hydrospace21
- hylozoisms27
- hypaethral20
- hypallages21
- hyperbolas21
- hyperbolic24
- hyperemias20
- hypergolic23
- hypermania21
- hypermanic24
- hyperopias20
- hyperploid22
- hypersonic21
- hyperspace23
- hypocorism23
- hypocrites20
- hypodermal22
- hypodermic24
- hypodermis21
- hypomanias21
- hypomorphs25
- hypophyses24
- hypophysis24
- hypoplasia21
- hypoploids22
- hypostomes20
- hypothesis19
- hypoxemias27
- hysterical18
- iconoclasm21
- iconoscope20
- icosahedra16
- ideographs18
- ideography20
- impassable20
- impassably22
- impeccably28
- impersonal18
- improperly22
- ionophores16
- ischaemias18
- isocaloric17
- isochronal17
- isochrones16
- isocracies16
- isomorphic21
- isopropyls19
- isothermal16
- karyologic22
- karyosomes19
- kiloparsec21
- kymographs26
- lachrymose21
- lagniappes20
- lagomorphs21
- lamaseries14
- lampooners18
- lampoonery20
- laparotomy19
- lathyrisms18
- laypersons17
- lemongrass17
- leprosaria14
- lithograph20
- logaoedics17
- logarithms18
- logographs20
- logogriphs20
- logorrheas15
- logorrheic18
- logotypies18
- lophophore21
- lymphatics24
- lymphogram26
- macaronics20
- macaronies17
- macrocosms22
- macrocytes21
- macrophage23
- macrophyte23
- macroscale20
- magistracy20
- maharishis17
- mahoganies18
- malachites19
- malacology22
- malapropos20
- manslayers17
- maraschino19
- marcasites16
- marchpanes22
- marshaling19
- marsupials18
- mascarpone20
- massacring19
- mastership18
- mechanical23
- megacycles24
- megalopses19
- megaparsec21
- megaphonic24
- megascopic24
- megaspores18
- megasporic21
- mesogloeas16
- mesomorphs21
- mesomorphy23
- mesophylls22
- mesophytic23
- metaphoric21
- metaphysic23
- metropolis17
- microchips24
- microcodes20
- microcosms22
- microcytes21
- micrograph23
- microluces21
- micromoles20
- microphage23
- microphone22
- microphyll25
- micropores19
- micropylar22
- micropyles22
- microscale20
- microscope22
- microscopy24
- microsomal20
- microsomes19
- microspore19
- mimeograph23
- mineralogy19
- misapplies20
- miscatalog19
- mischances22
- mischarged21
- mischarges20
- mischoices21
- miscolored18
- misemploys22
- mislocates17
- misologies16
- mispackage25
- mispatches21
- misphrased19
- misphrases18
- missiology18
- monarchial20
- monarchies19
- monocarpic23
- monochasia19
- monographs21
- monolayers17
- monologies17
- monopolies18
- monopolise18
- moonscapes20
- morphemics24
- morphogens21
- morphology23
- mosaically20
- motorcycle22
- musicology22
- mycoflorae22
- mycofloras22
- mycologies21
- mycologist21
- mycophiles24
- mycoplasma25
- myocardial20
- myopathies20
- mythologer20
- mythologic23
- mythopoeia20
- mythopoeic23
- narcolepsy20
- necropolis18
- nemophilas20
- neoclassic18