10-letter words containing o, s, i
- fireboards — Plural form of fireboard.
- firehouses — Plural form of firehouse.
- firestorms — Plural form of firestorm.
- firethorns — Plural form of firethorn.
- first born — Someone's first born is their first child.
- first down — the first of four consecutive plays during which an offensive team must advance the ball at least ten yards to retain possession of it.
- first form — the first class that children go into at school
- first lord — the head of a board commissioned to perform the duties of a high office of state: First Lord of the Admiralty.
- first post — a position of duty, employment, or trust to which one is assigned or appointed: a diplomatic post.
- first-born — first in the order of birth; eldest.
- first-come — arranged, considered, or done in order of application or arrival, as for purposes of service: orders filled on a first-come basis.
- first-foot — the first person to cross the threshold of a house on New Year's Day.
- firstcomer — a person who arrives first or among the first.
- fish flour — powdered fish, high in protein, used as an ingredient in other foods.
- fish joint — a connection formed by fishplates at the meeting point of two rails, beams, etc, as on a railway
- fish louse — any of numerous small crustaceans, especially certain copepods, parasitic on the skin and gills of fish.
- fish story — an exaggerated or incredible story: It was just another one of his fish stories.
- fisherfolk — People who catch fish for a living.
- fishmonger — a dealer in fish, especially for eating.
- five towns — the, a district in central England famous for the manufacture of pottery and china. The towns comprising this district were combined in 1910 to form Stoke-on-Trent.
- fixed cost — a cost unvarying with a change in the volume of business (distinguished from variable cost).
- flagitious — shamefully wicked, as persons, actions, or times.
- flamingoes — Plural form of flamingo.
- flashpoint — Also, flashing point. Physical Chemistry. the lowest temperature at which a liquid in a specified apparatus will give off sufficient vapor to ignite momentarily on application of a flame.
- flavonoids — Plural form of flavonoid.
- flavorings — Plural form of flavoring.
- flavourist — a chemist who blends ingredients to create artificial flavours or scents, for food or perfume
- flexihours — hours of work under flexitime
- flexuosity — the quality or condition of being flexuous.
- flintlocks — Plural form of flintlock.
- flintstone — A piece of flint.
- flip-flops — Informal. a sudden or unexpected reversal, as of direction, belief, attitude, or policy.
- floorshift — a gearshift set into the floor of an automotive vehicle.
- floppiness — tending to flop.
- florideous — belonging to the Florideae family of algae, or having the characteristics thereof
- floridness — The quality of being florid.
- florissant — a city in E Missouri, near St. Louis.
- floristics — the study of the distribution, number, types, and relationships of plant species in an area or areas.
- flos ferri — a variety of aragonite that is deposited from hot springs in the form of a white branching mass
- flotations — Plural form of flotation.
- flourished — to be in a vigorous state; thrive: a period in which art flourished.
- flourisher — One who flourishes.
- flourishes — Third-person singular simple present indicative form of flourish.
- fluoridise — fluoridate
- fluxionist — a person who uses mathematical fluxions
- flyposting — the posting of advertising or political bills, posters, etc in unauthorized places
- fog signal — any of various types of signal used as a warning by vessels navigating in fog or mist.
- foilswoman — a woman who uses or specializes in using a foil
- foisonless — without strength; weak
- foliaceous — of, like, or of the nature of a plant leaf; leaflike.