11 letters
- fissionable19
- flirtations16
- flirtatious16
- floatations16
- floriations16
- fluctuation21
- fomentation19
- forestation15
- formulation20
- fornication19
- foundations18
- fractionate18
- fractioning21
- fractiously21
- frustration16
- fulguration20
- fulmination21
- fumigations21
- functionary22
- functioning23
- fustigation18
- ganglioside18
- geminations18
- generations15
- germination18
- gestational15
- glaciations18
- gladioluses17
- gleizations24
- glutathione18
- gnotobiotic20
- goniometers17
- goniometric20
- gradational16
- gradiometer17
- graduations16
- grandiosely18
- grandiosity17
- granulation17
- gratulation16
- gravitation18
- habitations17
- habituation18
- hagiography24
- hagiologies18
- hagioscopes21
- hagioscopic24
- hebetations17
- heliographs21
- heliometers17
- heliometric20
- heliotropes17
- heliotropic20
- hemangiomas22
- herniations15
- hesitations14
- hibernation18
- hilariously18
- histiocytes18
- histiocytic21
- histrionics17
- homoiotherm21
- homoiousian18
- humiliation19
- hyphenation22
- hypolimnion24
- hypotension20
- idioblastic19
- idiographic22
- idiomorphic23
- idiotically19
- idolization23
- ignominious19
- illusionary17
- illusionism18
- illusionist15
- illustrious15
- illuviation19
- imagination18
- imbibitions21
- imbrication21
- immigration20
- immolations19
- impartation18
- impassioned19
- impecunious23
- imperiously21
- impetration18
- implication22
- importation18
- impositions18
- imprecation21
- imprecision21
- impresarios17
- impressions18
- imputations19
- inattention14
- incantation17
- incarnation17
- incitations16
- inclination18
- incubations20
- inculcation21
- inculpation21
- incuriosity18
- incuriously20
- incurvation21
- indagations16
- indecisions17
- indentation15
- indexations21
- indications17
- indigestion16
- indignation17
- indirection17
- indurations15
- industrious15
- inebriation16
- infarctions19
- infatuation17
- inferiority17
- infestation16
- infixations23
- inflections20
- inflictions20
- information19
- infractions19
- infuriation17
- ingeniously19
- ingressions15
- inhalations16
- inhibitions18
- inhumations19
- initiations13
- injudicious27
- injunctions27
- injuriously26
- innervation18
- innovations18
- inoculation18
- inquisition23
- inscription19
- insertional14
- insidiously17
- insinuation15
- insolations14
- inspections19
- inspiration16
- instigation15
- institution14
- instruction17
- insulations15
- intaglioing18
- integration15
- intensional15
- intentional15
- interaction16
- interfusion17
- interiorise12
- interiority14
- interiorize21
- internuncio18
- interunions15
- intimations16
- intinctions17
- intonations14
- intubations17
- intuitional15
- inundations16
- invidiously21
- inviolacies20
- inviolately20
- invitations17
- invocations20
- involutions19
- iodinations14
- ionizations22
- ionospheres17
- ionospheric20
- irradiation13
- irrationals13
- irreligions15
- irreligious15
- irrigations14
- irritations12
- itemization24
- itineration13
- jactitation24
- jubilations26
- judiciously29
- kinesiology21
- kwashiorkor24
- labiodental18
- labiovelars20
- laboriously19
- lacerations16
- laciniation17
- lacrimation19
- lactational17
- laicization25