9-letter words containing s, i, o
- fossilogy — (archaic, 1776-19th century) The science or study of fossils.
- fossorial — digging or burrowing.
- fostering — Encourage or promote the development of (something, typically something regarded as good).
- foundries — Plural form of foundry.
- fountains — Plural form of fountain.
- four bits — 50 cents.
- fractions — Mathematics. a number usually expressed in the form a/b. a ratio of algebraic quantities similarly expressed.
- fractious — refractory or unruly: a fractious animal that would not submit to the harness.
- framboise — raspberry.
- francisco — a male given name, Spanish form of Francis.
- free soil — territory in which there is no slavery; esp., any territory in the U.S. where slavery was prohibited before the Civil War
- free-soil — pertaining to or opposing the extension of slavery in the Territories.
- frescoing — Present participle of fresco.
- frictions — Plural form of friction.
- frictious — (rare) Of, related to, or caused by friction.
- frivilous — Misspelling of frivolous.
- frivolous — characterized by lack of seriousness or sense: frivolous conduct.
- frobisher — Sir Martin, 1535?–94, English navigator and explorer.
- frog spit — Also, frog spittle. any of several filamentous freshwater green algae forming floating masses.
- froglings — Plural form of frogling.
- froissart — Jean [zhahn] /ʒɑ̃/ (Show IPA), 1333?–c1400, French chronicler.
- frontalis — A muscle of the head, sometimes considered to be part of the occipitofrontalis muscle.
- frontenis — a Latin American game, resembling squash, played with rackets and a hard rubber ball on a three-walled court similar to a jai alai court.
- frontiers — Plural form of frontier.
- frontlist — a publisher's sales list of newly or recently published books, especially those of popular or ephemeral appeal.
- frontside — Denoting a maneuver in surfing and other board sports that is done counterclockwise for a regular rider and clockwise for a goofy rider.
- frontwise — Toward the front; in the direction of the front; frontward.
- frostbite — injury to any part of the body after excessive exposure to extreme cold, sometimes progressing from initial redness and tingling to gangrene.
- frostfish — either of two North American fishes, the tomcod of the Atlantic Ocean or the round whitefish, that appear when frost sets in.
- frostline — the maximum depth at which soil is frozen.
- fruitions — Plural form of fruition.
- fruticose — having the form of a shrub; shrublike.
- fruticous — (botany) fruticose.
- fugacious — fleeting; transitory: a sensational story with but a fugacious claim on the public's attention.
- fulminous — Explosive.
- fumonisin — Any of a class of neurotoxic, pneumotoxic and hepatotoxic mycotoxins derived from fungi of the genus Fusarium.
- functions — Plural form of function.
- fungosity — the condition of being fungous.
- furacious — given to stealing; thievish
- furiosity — Lb obsolete furiousness; fury.
- furiously — full of fury, violent passion, or rage; extremely angry; enraged: He was furious about the accident.
- fusel oil — a mixture consisting chiefly of amyl alcohols obtained as a by-product in the fermentation of grains.
- fusionism — the principle, policy, or practice of fusion.
- gainsboro — A light bluish grey colour.
- galinsoga — any of several weedy composite plants of the genus Galinsoga, especially G. ciliata or G. parviflora, having small flower heads with short, sparse white rays.
- gallipots — Plural form of gallipot.
- ganglions — Plural form of ganglion.
- garnishor — (legal) A person who garnishes; one who obtains a garnishment against another.
- garrisons — Plural form of garrison.
- gascoigne — George, 1525?–77, English poet.