10 letters
- excavation25
- excelsiors21
- exceptions24
- excerption24
- excisional22
- excitation21
- exclusions23
- excretions21
- excursions22
- execration21
- executions22
- exemptions24
- exhalation21
- exhaustion21
- exhibition23
- exhumation24
- exobiology25
- expansions22
- expedition22
- expiations21
- expiration21
- explosions22
- exposition21
- expression21
- expulsions23
- expunction26
- exsertions18
- exsolution20
- extensions19
- exteriorly20
- extinction22
- extortions18
- extraction21
- extrusions19
- exudations20
- exultation20
- exuviation23
- factiously20
- factitious17
- fallacious19
- fasciation17
- fashioners16
- fashioning19
- fastidious15
- federation15
- fellations16
- fictioneer17
- fictionist17
- fictionize26
- fictitious17
- figuration17
- filiations15
- filtration15
- fissioning17
- flagitious17
- flirtation15
- floatation15
- floriation15
- flotations15
- foliations15
- formations17
- foundation17
- fractional18
- fractioned18
- frictional18
- fumigation20
- functional20
- functioned20
- furcations18
- fusionists15
- ganglionic20
- gazillions24
- gemination17
- gemmations19
- generation14
- gestations13
- glaciation17
- glaciology21
- gleization23
- gloriously17
- goniometer16
- goniometry18
- graciously19
- gradations14
- graduation15
- gregarious15
- gustations14
- guttations14
- gyrational16
- habitation16
- hagiologic20
- hagioscope20
- harmonious17
- hebetation16
- heliograph20
- heliolatry16
- heliometer16
- heliostats13
- heliotrope16
- heliozoans23
- hellacious18
- hemangioma21
- herniation14
- hesitation13
- histiocyte17
- histrionic16
- hydrations16
- ideational13
- idioblasts15
- idiolectal16
- idiopathic19
- illusional15
- imbibition20
- imbroglios19
- imitations14
- immersions17
- immolation18
- impactions20
- impassions17
- impervious21
- implosions18
- imposition17
- impresario16
- impression17
- impulsions19
- imputation18
- inanitions13
- incautions16
- incautious16
- inceptions18
- incitation15
- inclusions17
- incubation19
- incursions16
- indagation15
- indecision16
- indentions14
- indexation20
- indication16
- indictions16
- inductions17
- induration14
- infarction18
- infections18
- infectious18
- inferiorly17
- infixation22
- inflations16
- inflection19
- inflexions23
- infliction19
- infraction18
- ingestions14
- inglorious15
- ingression14
- inhalation15
- inhibition17
- inhumation18
- initiation12
- injections24
- injunction26
- innovation17
- insertions12
- insolation13
- inspection18
- insulation14
- intaglioed15
- intensions13
- intentions13
- interionic15
- interiorly14
- interunion14
- intimation15
- intinction16
- intonation13
- intrusions13
- intubation16
- intuitions13
- inunctions17
- inundation15
- inventions17
- inversions16
- inviolable20
- inviolably22
- invitation16
- invocation19
- involution18
- iodinating15
- iodination13
- ionicities14
- ionization21
- ionophores16
- ionosphere16
- irrational12
- irreligion14
- irrigation13
- irritation11
- irruptions15
- isolations12
- iterations11