15-letter words containing o, f, a, c
- flood insurance — insurance covering loss or damage to property arising from a flood, flood tide, or the like.
- florida current — the part of the Gulf Stream which extends from the Florida Strait to Cape Hatteras.
- fluorochemicals — Plural form of fluorochemical.
- focal infection — an infection in which bacteria are localized in some region, as the tonsils or the tissue around a tooth, from which they may spread to some other organ or structure of the body.
- foolscap octavo — a book size, 41⁄4 by 63⁄4 inches
- foolscap quarto — a book size, 63⁄4 by 81⁄2 inches (foolscap quarto)
- for a certainty — without doubt
- force de frappe — a military strike force, esp the independent nuclear strike force of France
- forecastle deck — a partial weather deck on top of a forecastle superstructure; topgallant forecastle.
- forecastle head — the extreme fore part of a forecastle superstructure.
- formal calculus — an uninterpreted symbolic system whose syntax is precisely defined, and on which a relation of deducibility is defined in purely syntactic terms; a logistic system
- formation dance — any dance in which a number of couples form a certain arrangement, such as two facing lines or a circle, and perform a series of figures within or based on that arrangement
- forward echelon — (in a military operation) the troops and officers in a combat zone or in a position to engage the enemy.
- four-ball match — a match, scored by holes, between two pairs of players, in which the four players tee off and the partners alternate in hitting the pair's ball having the better lie off the tee.
- fourth official — In football, the fourth official is an official who assists the referee and assistant referees from the side of the pitch.
- fovea centralis — a small pit or depression at the back of the retina forming the point of sharpest vision.
- fractional note — a banknote in a denomination smaller than the standard unit of currency
- fractionalizing — Present participle of fractionalize.
- franco-american — an American of French or French-Canadian descent.
- french marigold — a composite plant, Tagetes patula, of Mexico, having yellow flowers with red markings.
- french togoland — a former United Nations Trust Territory in W Africa, administered by France (1946–60), now the independent republic of Togo
- friend at court — a friend in a position of influence or power who may advance one's interests, especially a helpful person who is close to someone in authority.
- frontal cyclone — any extratropical cyclone associated with a front: the most common cyclonic storm.
- fructifications — Plural form of fructification.
- functionability — functional (def 3).
- functional food — a food containing additives which provide extra nutritional value
- functional load — the relative frequency of occurrence of words that are differentiated in one and the same position by only one distinctive feature. In English, the opposition of voiced and voiceless th has a low functional load being used only to distinguish such pairs as ether and either, or wreath and wreathe.
- functional unit — A subsystem of the central processing unit of a computer. E.g. arithmetic and logic unit, memory address register, barrel shifter, register file.
- functionalistic — of or relating to a function or functions: functional difficulties in the administration.
- functionalities — of or relating to a function or functions: functional difficulties in the administration.
- fusospirochetal — Relating to fusospirochetes.
- gaelic football — an Irish game played with 15 players on each side and goals resembling rugby posts with a net on the bottom part. Players are allowed to kick, punch, and bounce the ball and attempt to get it over the bar or in the net
- gale-force wind — a wind of force seven to ten on the Beaufort scale or from 45 to 90 kilometres per hour
- general officer — an officer ranking above colonel.
- goal difference — the number of goals scored by a team minus the number of goals it has conceded
- grace-and-favor — noting a residence owned by a noble or sovereign and bestowed by him or her upon some person for that person's lifetime.
- granitification — the process or action of forming into granite
- grecian profile — a profile distinguished by the absence of the hollow between the upper ridge of the nose and the forehead, thereby forming a straight line.
- gulf of fonseca — an inlet of the Pacific Ocean in W Central America
- hacking x for y — [ITS] Ritual phrasing of part of the information which ITS made publicly available about each user. This information (the INQUIR record) was a sort of form in which the user could fill out various fields. On display, two of these fields were always combined into a project description of the form "Hacking X for Y" (e.g. ""Hacking perceptrons for Minsky""). This form of description became traditional and has since been carried over to other systems with more general facilities for self-advertisement (such as Unix plan files).
- han unification — Han character
- hanging offence — a crime that is punishable by hanging
- hausdorff space — a topological space in which each pair of points can be separated by two disjoint open sets containing the points.
- heralds' office — the official heraldic authority of Scotland.
- holding furnace — a small furnace for holding molten metal produced in a larger melting furnace at a desired temperature for casting.
- holiday traffic — increased road traffic during holiday periods and public holidays
- humidifications — Plural form of humidification.
- hydrofracturing — a process in which fractures in rocks below the earth's surface are opened and widened by injecting chemicals and liquids at high pressure: used especially to extract natural gas or oil.
- hyperfunctional — of or relating to a function or functions: functional difficulties in the administration.
- hyperweak force — a hypothetical force that transforms quarks into leptons and vice versa at high energies.