10 letters
- foremother18
- foreordain15
- forerunner16
- forestries13
- foretasted14
- foretastes13
- foretokens18
- foretopman20
- foretopmen20
- forfeiters16
- forfeiture17
- forgetters15
- forlornest15
- formations17
- formatives20
- formatters16
- formatting19
- formulates18
- formulator18
- fornicated18
- fornicates17
- fornicator17
- fortalices17
- fortepiano17
- fortitudes15
- fortuities14
- fortuitous15
- foundation17
- fountained17
- fourragere16
- fourteener15
- fourteenth17
- fractioned18
- fracturing20
- franchisee19
- franchiser19
- franchisor19
- francolins19
- fraternity16
- fraternize23
- freemartin17
- fremituses17
- fricandoes18
- fritterers13
- frolicsome20
- fromenties17
- frontcourt18
- fruitcakes21
- fruiterers14
- frumenties18
- frustrated15
- frustrates14
- frutescent18
- fulminates19
- fumatories17
- fumigators19
- fumitories17
- functional20
- functioned20
- fundaments20
- fundraiser16
- furanoside16
- furbearers17
- furcations18
- furmenties18
- furnitures16
- furosemide18
- furrieries14
- furtherers16
- garnitures14
- gastronome16
- generation14
- generators13
- geomancers19
- geomancies19
- geometrics18
- germinates16
- goniometer16
- gramercies18
- gramineous17
- greenrooms16
- guncottons18
- haircutter16
- harmonious17
- hematocrit18
- hemostatic18
- heteroatom15
- homoerotic18
- homoousian17
- honoraries13
- honorarium17
- housefront17
- housetrain14
- humectants20
- hurricanes17
- iceboaters16
- ichneumons21
- ignorances17
- immanences21
- imperators16
- imperfects22
- impetrates16
- importance20
- importuner18
- importunes18
- impotences20
- imprecates19
- incarnates15
- incautions16
- incinerate15
- incitement18
- incoherent17
- inconstant16
- increasers14
- increments18
- increscent18
- incubators18
- incumbents22
- incurrence19
- incurvates19
- indecorous16
- indecorums19
- indentures14
- inducement20
- infantries15
- infarction18
- infatuates15
- infections18
- infectious18
- inferences18
- infestants15
- influences20
- informants18
- infraction18
- infrasonic18
- infrequent25
- infuriates15
- infusorian16
- injectants24
- innermosts15
- innervates16
- innocenter16
- innovators16
- innumeracy21
- innumerate16
- innumerous17
- inoculants17
- inoculates16
- inoculator16
- inosculate16
- inseminate15
- insinuator13
- insouciant16
- instalment16
- instructed16
- instructor15
- instrument16
- insurances16
- insurgence18
- intactness15
- integrates13
- integrator13
- integument18
- intenerate12
- interacted15
- intercaste14
- intercepts17
- intercrops17
- intercross14
- interfaced18
- interfaces17
- interferer14
- interferes14
- interferon15
- interfused16
- interfuses15
- intergraft16
- interjects23
- interlaces15
- interlunar14
- intermarry16
- interments15
- intermural16
- internment16
- internodes13
- interocean15
- interorgan14
- interposer14
- interprets14
- interregna14
- interrenal13
- interrupts15
- intersects14
- interspace17
- interstage13
- interstate11
- interstice14
- intertroop14
- interurban16
- intervenor16