12-letter words containing r, e, s, t, o
- extra-strong — stronger than average; very strong
- extraditions — Plural form of extradition.
- extraneously — In an extraneous manner.
- extrapolates — Third-person singular simple present indicative form of extrapolate.
- extrasensory — Of or relating to extrasensory perception.
- extrasystole — A heartbeat outside the normal rhythm, as often occurs in normal individuals.
- extraversion — Alternative spelling of extroversion.
- extropianism — Belief in, or support for, the theory of extropy.
- extroversion — (psychology) Concern with or an orientation toward others or what is outside oneself; behavior expressing such an orientation; the definitive characteristic of an extrovert.
- extrovertish — Extroverted.
- factorisable — Alternative spelling of factorizable.
- 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
- 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.
- 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
- 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 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)
- 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.
- fluorimeters — Plural form of fluorimeter.
- fluorometers — Plural form of fluorometer.
- flusteration — (colloquial, dated) The act of flustering, or the state of being flustered.
- foolhardiest — Superlative form of foolhardy.
- foot soldier — an infantryman.
- footsoldiers — Plural form of footsoldier.
- footsoreness — The characteristic of being footsore.
- for instance — a case or occurrence of anything: fresh instances of oppression.
- for starters — a person or thing that starts.
- for the best — of the highest quality, excellence, or standing: the best work; the best students.
- for-instance — an instance or example: Give me a for-instance of what you mean.
- fore-topmast — the spar or section of a pole mast serving as the topmast of a foremast on a ship.
- fore-topsail — a topsail set on a foremast on a ship.
- forecastable — to predict (a future condition or occurrence); calculate in advance: to forecast a heavy snowfall; to forecast lower interest rates.
- foredestined — Simple past tense and past participle of foredestine.
- forequarters — the forward end of half of a carcass, as of beef or lamb.
- foreshortens — Third-person singular simple present indicative form of foreshorten.