12-letter words containing f, i, s, r, o
- fluoresceine — Alternative spelling of fluorescein.
- fluorimeters — Plural form of fluorimeter.
- fluoroscopic — of or relating to the fluoroscope or fluoroscopy.
- flusteration — (colloquial, dated) The act of flustering, or the state of being flustered.
- folkloristic — the traditional beliefs, legends, customs, etc., of a people; lore of a people.
- followership — the ability or willingness to follow a leader.
- food service — the preparation, delivery, serving, etc., of ready-to-eat foods: The cafeteria employs over 20 people in food service.
- foolhardiest — Superlative form of foolhardy.
- foot soldier — an infantryman.
- footsoldiers — Plural form of footsoldier.
- for instance — a case or occurrence of anything: fresh instances of oppression.
- for-instance — an instance or example: Give me a for-instance of what you mean.
- forcibleness — The quality of being forcible.
- fore-topsail — a topsail set on a foremast on a ship.
- foreadmonish — (rare, transitive) To admonish beforehand, or before the act or event.
- foredestined — Simple past tense and past participle of foredestine.
- foreman-ship — a person in charge of a particular department, group of workers, etc., as in a factory or the like.
- forensically — pertaining to, connected with, or used in courts of law or public discussion and debate.
- foreseeingly — by way of foreseeing
- foresightful — care or provision for the future; provident care; prudence.
- forestalling — Present participle of forestall.
- forestaysail — a triangular sail set on a forestay; the innermost headsail of a vessel.
- foretopsails — Plural form of foretopsail.
- formularizes — Third-person singular simple present indicative form of formularize.
- formulations — Plural form of formulation.
- fornications — Plural form of fornication.
- fornicatress — (obsolete) A woman guilty of fornication.
- forrest city — a city in E Arkansas.
- fort collins — a city in N Colorado.
- fort madison — a city in SE Iowa, on the Mississippi.
- fort pickens — Andrew, 1739–1817, American Revolutionary general.
- fort pulaski — Count Casimir [kaz-uh-meer] /ˈkæz əˌmɪər/ (Show IPA), 1748–79, Polish patriot; general in the American Revolutionary army.
- fortepianist — the player of a fortepiano
- fortresslike — Resembling a fortress in shape or impregnability.
- fortuitously — In a fortuitous manner.
- forty-niners — a person, especially a prospector, who went to California in 1849 during the gold rush.
- forward bias — a voltage applied to a circuit or device, esp a semiconductor device, in the direction that produces the larger current
- foster child — a child raised by someone who is not its natural or adoptive parent.
- four-striper — a captain in the U.S. Navy.
- fourdriniers — Plural form of fourdrinier.
- fox squirrel — any of several North American arboreal squirrels varying in color and of an exceptionally large size.
- fracastorius — a walled plain in the fourth quadrant of the face of the moon: about 60 miles (97 km) in diameter.
- friction saw — a high-speed circular saw, usually toothless, that is used for cutting metals by using frictional heat to melt the material adjacent to it.
- frictionless — surface resistance to relative motion, as of a body sliding or rolling.
- fritto misto — small pieces of meat, fish, or vegetables dipped in batter and deep-fried.
- frog sticker — Slang. a knife, especially one carried as a weapon.
- frog-sticker — Slang. a knife, especially one carried as a weapon.
- frolicsomely — In a frolicsome manner.
- frondiferous — Producing fronds.
- frontiersman — a person, especially a man, who lives on the frontier, especially in sparsely settled regions.