12-letter words containing i, n, f, r
- fleet prison — (formerly) a London prison, esp used for holding debtors
- flegenheimer — Arthur ("Dutch Schultz") 1902–35, U.S. gangster.
- flickeringly — In a flickering manner.
- flight nurse — a nurse in the U.S. Air Force who tends patients being transported by airplane.
- flindermouse — (obsolete) A bat (the mammal).
- flinders bar — a bar of soft iron, mounted vertically beneath a compass to compensate for vertical magnetic currents.
- floating rib — one member of the two lowest pairs of ribs, which are attached neither to the sternum nor to the cartilages of other ribs.
- flooring saw — a saw having a curved edge.
- flop forging — forging of both sides of a piece from the same die, the sides being identical.
- flourishment — The act or state of flourishing.
- flowcharting — (computing) the design and construction of flowcharts.
- fluoresceine — Alternative spelling of fluorescein.
- fluoridating — Present participle of fluoridate.
- fluoridation — the addition of fluorides to the public water supply to reduce the incidence of tooth decay.
- fluorinating — Present participle of fluorinate.
- fluorination — (chemistry) The introduction of fluorine into a compound by means of a chemical reaction.
- flusteration — (colloquial, dated) The act of flustering, or the state of being flustered.
- fluviomarine — of or formed by the combined action of river and sea.
- fly in amber — a strange relic or reminder of the past
- flyfisherman — Flyfisher.
- flyfishermen — Plural form of flyfisherman.
- flying lemur — either of two lemurlike mammals, Cynocephalus variegatus, of southeastern Asia and the East Indies, or C. volans, of the Philippines, having broad folds of skin on both sides of the body to aid in gliding from tree to tree: now rare.
- flying shear — (in a continuous rolling mill) a shear that moves with the piece being cut.
- flying start — a start, as in sailboat racing, in which the entrants begin moving before reaching the starting line.
- foetoprotein — Alternative spelling of fetoprotein.
- folding door — a door with hinged sections that can be folded flat against one another when opened.
- folding rule — a rule composed of light strips of wood joined by rivets so as to be foldable, all the opening and closing parts being in parallel planes.
- footdragging — the act or practice of acting with deliberate slowness
- 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.
- foraging ant — any of several ants, as army ants, that forage as part of a large group.
- foraminifera — any chiefly marine protozoan of the sarcodinian order Foraminifera, typically having a linear, spiral, or concentric shell perforated by small holes or pores through which pseudopodia extend.
- forbearingly — In a forbearing manner.
- forbiddingly — In a forbidding manner.
- forcibleness — The quality of being forcible.
- foreadmonish — (rare, transitive) To admonish beforehand, or before the act or event.
- forebodingly — a prediction; portent.
- forebuilding — (architecture,historical) An outer defense work of a castle used to protect the entrance to the keep.
- foredestined — Simple past tense and past participle of foredestine.
- foreign bill — a bill of exchange drawn on a payer in one country by a maker in another.
- foreign body — object lodged where it does not belong
- foreign-born — born in a country other than that in which one resides.
- foreign-flag — (of a vessel or aircraft) having a registry under a nationality other than one's own: rivalry between U.S.-flag freighters and foreign-flag ships.
- 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.
- foreordained — to ordain or appoint beforehand.
- foreordinate — foreordain.
- foreseeingly — by way of foreseeing
- forestalling — Present participle of forestall.
- foretokening — Indication in advance.