12-letter words containing o, t, f, r, s
- draftsperson — a person employed in making mechanical drawings, especially in an architectural or engineering firm.
- efflorescent — efflorescing; blossoming.
- effortlessly — requiring or involving no effort; displaying no signs of effort; easy: an effortless writing style.
- effronteries — Plural form of effrontery.
- effusiometer — an apparatus for determining rates of effusion of gases, usually used for measuring molecular weights
- elfin forest — the zone of stunted wind-blown trees growing at high altitudes just above the timberline on tropical mountains
- enforcements — Plural form of enforcement.
- equisetiform — having the form of equisetum
- fabrications — Plural form of fabrication.
- facilitators — Plural form of facilitator.
- factorisable — Alternative spelling of factorizable.
- factory acts — laws relating to factories
- factory ship — a whaling ship equipped to process killed whales and to transport the oil and by-products.
- fast forward — advance rapidly through
- fast neutron — a neutron produced by nuclear fission that has lost little energy by collision; a neutron with a kinetic energy in excess of 0.1 MeV
- fast reactor — a nuclear reactor using little or no moderator, fission being caused by fast neutrons
- fast-forward — a function of an audio or video recorder or player, as a cassette deck or DVR, that allows the content to be advanced rapidly.
- fast-growing — growing very quickly
- favorite son — (at a national political convention) a candidate nominated for office by delegates from his or her own state.
- feather shot — fine bean shot.
- fenestration — the design and disposition of windows and other exterior openings of a building.
- festivalgoer — A person attending a festival.
- fetoproteins — Plural form of fetoprotein.
- fianarantsoa — a city in E central Madagascar.
- fiber optics — the branch of optics that deals with the transmission of light through transparent fibers, as in the form of pulses for the transmission of data or communications, or through fiber bundles for the transmission of images.
- fibre optics — optical fibre
- fibroblastic — a cell that contributes to the formation of connective tissue fibers.
- fibromatosis — (pathology) The presence of multiple fibromas.
- fibrous root — a root, as in most grasses, having numerous, very fine branches of approximately the same length.
- fidel castro — Cipriano [sip-ree-ah-noh;; Spanish see-pree-ah-naw] /ˌsɪp riˈɑ noʊ;; Spanish ˌsi priˈɑ nɔ/ (Show IPA), 1858?–1924, Venezuelan military and political leader: president 1901–08; exiled 1908.
- field sports — sports carried on in the open countryside, such as hunting, shooting, or fishing
- fire station — a building in which firefighting apparatus and usually fire department personnel are housed; firehouse.
- fire support — support given by artillery and aircraft to infantry and armored vehicles.
- first cousin — cousin (def 1).
- first nation — any of the indigenous peoples or Indian communities of Canada, especially one formally recognized by the Canadian government.
- first of all — to start with
- first person — the grammatical person used by a speaker in statements referring to himself or herself (first person singular) or to a group including himself or herself (first person plural)
- first school — A first school is a school for children aged between five and eight or nine.
- first violin — one of the principal group of violins in an orchestra
- fish factory — a factory where fish is processed
- fishing port — a town which has a lot of fishing boats
- fissirostral — having a broad, deeply cleft beak or bill, as the swallows and goatsuckers.
- fitness room — a room with gym equipment in it
- flagellators — Plural form of flagellator.
- flatterously — in a flatterous manner
- fleet prison — (formerly) a London prison, esp used for holding debtors
- flittermouse — bat2 (def 1).
- flour sifter — a container in which flour is sifted
- flourishment — The act or state of flourishing.
- fluorescents — Plural form of fluorescent.