10 letters
- heterogeny17
- heterogony17
- heterophil18
- hibernates16
- hibernator16
- hierophant18
- histologic18
- historical16
- hoactzines25
- hoarsening16
- hologamies18
- holographs20
- hologynies18
- holstering16
- homogenate18
- homogenies18
- homogenise18
- homopteran19
- honeyeater15
- honoraries13
- honorarily16
- hoofprints19
- hopsacking25
- horizontal23
- horologies15
- horologist15
- horsepower18
- horseraces15
- horsetails13
- hospitable19
- hostelling17
- hostelries13
- houseclean18
- houseplant18
- housetrain14
- hurricanes17
- hyperalert18
- hypergolic23
- hypersonic21
- hypertense18
- hypertonia18
- hypertonic21
- hypocenter21
- hypocrites20
- hypostatic20
- hypotonias18
- hysteretic17
- hysterical18
- iatrogenic16
- iceboaters16
- iconoclast18
- iconolatry17
- ideographs18
- ignorances17
- imperators16
- impersonal18
- impetrates16
- implanters18
- importance20
- impotences20
- imprecates19
- impregnate19
- inbreathes16
- inchoately19
- incoherent17
- incomplete21
- increasers14
- inculpates19
- inelegance18
- ingathered16
- inhalators14
- inherences17
- inheritors13
- inoculates16
- inoculator16
- inoperable18
- inosculate16
- inselberge17
- inspectors17
- inspirator14
- instigator13
- instructor15
- integrable17
- integrated14
- integrates13
- integrator13
- intellects16
- intenerate12
- interacted15
- intercaste14
- interceder15
- intercedes15
- intercepts17
- interclass15
- intercrops17
- intercross14
- interested12
- interfaces17
- interferer14
- interferes14
- intergrade14
- intergraft16
- intergroup17
- interjects23
- interlaced16
- interlaces15
- interlards13
- interlayer14
- interleave16
- interlocal16
- interlocks19
- interloped16
- interloper15
- interlopes15
- interocean15
- interorgan14
- interparty16
- interphase16
- interplant16
- interplays17
- interplead16
- interposed15
- interposer14
- interposes14
- interprets14
- interreges13
- interregna14
- interrenal13
- interrogee13
- interrupts15
- intersects14
- interspace17
- interstage13
- interstate11
- interstice14
- intertrial12
- intertroop14
- intervales16
- intolerant13
- intraplate15
- intrenches17
- introjects23
- introspect17
- introverts15
- inveterate15
- ionophores16
- ionosphere16
- ironmaster14
- irredentas12
- irregulars14
- irrelevant16
- irresolute12
- irreverent15
- irrigators12
- isentropic17
- isochronal17
- isochrones16
- isooctanes14
- isoplethic19
- isothermal16
- iterations11
- itinerates11
- kiloparsec21
- lacerating17
- laceration15
- lactations15
- lactogenic20
- lacustrine16
- lagomorphs21
- lampooners18
- langostino15
- languisher17
- larcenists15
- larghettos15
- latecomers17
- leadership17
- leathering16
- lectionary17
- lectotypes19
- lederhosen15
- legateship18
- legendries15
- legerities13
- legislator14
- leistering14
- lemniscate18
- lengthener17
- lengthiest16
- lengthwise19
- leprechaun21
- leprosaria14
- leptospire17
- leptotenes15
- lethargies15
- letterhead14
- letterings14
- liberators14
- licentiate15
- lienteries12
- lighteners16