15-letter words containing f, l, y
- family skeleton — a closely guarded family secret
- fauntleroy suit — a formal outfit for a boy composed of a hip-length jacket and knee-length pants, often in black velvet, and a wide, lacy collar and cuffs, usually worn with a broad sash at the waist and sometimes a large, loose bow at the neck, popular in the late 19th century.
- federal holiday — a day which is a national holiday at the behest of the Federal Government
- ferroelasticity — (physics) A phenomenon, analogous to ferromagnetism and ferroelectricity, in which spontaneous strain arises within a material.
- ferromolybdenum — a ferroalloy containing up to 60 percent molybdenum.
- fetishistically — in a fetishistic manner
- field artillery — artillery mobile enough to accompany troops in the field.
- field intensity — the vector sum of all forces exerted by a field on a unit mass, unit charge, unit magnetic pole, etc., at a given point within the field.
- fight city hall — to take up the apparently futile fight against petty or impersonal bureaucratic authority
- fixed liability — a liability, as a mortgage or debenture, that will not mature for a relatively long time.
- flavourdynamics — as in quantum flavour dynamics, a mathematical model used to describe the interaction of flavoured particles (weak force) through the exchange of intermediate vector bosons
- flight of fancy — An idea or statement that is very imaginative but complicated, silly, or impractical can be referred to as a flight of fancy.
- floating policy — (in marine insurance) a policy that provides protection of a broad nature for shipments of merchandise and that is valid continuously until canceled.
- floating supply — the aggregate supply of ready-to-market goods or securities.
- fly honeysuckle — either of two honeysuckle shrubs, Lonicera canadensis, of eastern North America, or L. xylosteum, of Eurasia, having paired yellowish flowers tinged with red.
- fly-on-the-wall — A fly-on-the-wall documentary is made by filming people as they do the things they normally do, rather than by interviewing them or asking them to talk directly to the camera.
- flying buttress — a segmental arch transmitting an outward and downward thrust to a solid buttress that through its inertia transforms the thrust into a vertical one.
- flying characin — hatchetfish (def 2).
- flying dutchman — a legendary Dutch ghost ship supposed to be seen at sea, especially near the Cape of Good Hope.
- flying fortress — a heavy bomber, the B-17, with four radial piston engines, widely used over Europe and the Mediterranean by the U.S. Air Force in World War II.
- flying jib boom — an extension on a jib boom, to which a flying jib is fastened.
- flying squirrel — any of various nocturnal tree squirrels, as Glaucomys volans, of the eastern U.S., having folds of skin connecting the fore and hind legs, permitting long, gliding leaps.
- follow-up study — a second study made as a follow-up to an initial study
- food technology — a branch of technology that is involved in the production of food
- football player — sportsperson: plays football
- forehand volley — a type of forehand shot played in tennis
- fountain valley — a city in SW California.
- free soil party — a former U.S. political party (1848–56) that opposed the extension of slavery in the Territories not yet admitted to statehood.
- french mulberry — a shrub, Callicarpa americana, of the verbena family, of the south-central U.S. and the West Indies, having violet-colored fruit and bluish flowers.
- frontal cyclone — any extratropical cyclone associated with a front: the most common cyclonic storm.
- fuel efficiency — the (least) amount of fuel used in proportion to the number of miles travelled
- full employment — all of workforce is employed
- fully fashioned — (of stockings, knitwear, etc) shaped and seamed so as to fit closely
- fumitory family — the plant family Fumariaceae, characterized by herbaceous plants having deeply cut basal or alternate leaves, flowers with four petals of which one or two are spurred or lobed, and fruit in the form of a capsule, and including the bleeding heart, Dutchman's-breeches, fumitory, and squirrel corn.
- functionability — functional (def 3).
- fungistatically — in a fungistatic manner
- genetic fallacy — the fallacy of confusing questions of validity and logical order with questions of origin and temporal order.
- geranium family — the plant family Geraniaceae, typified by herbaceous plants or small shrubs having lobed leaves, showy flowers, and slender, beak-shaped fruit, and including the crane's-bills, stork's-bills, and cultivated geraniums of the genus Pelargonium.
- gesneria family — the plant family Gesneriaceae, characterized by herbaceous plants having a basal rosette of usually toothed leaves, tubular two-lipped flowers, and fruit in the form of a berry or capsule, and including the African violet, gloxinia, and streptocarpus.
- greenbottle fly — any of several metallic-green blowflies, as Phaenicia sericata.
- heavenly father — a term used to address or refer to God
- holiday feeling — the positive feeling people experience while on holiday and during holiday periods such as the Christmas period
- holiday traffic — increased road traffic during holiday periods and public holidays
- hull efficiency — the ratio of the quantity of work required to tow a certain hull at a given speed to that required to drive it with a certain propeller: used in propeller design.
- hydraulic fluid — a fluid, usually of low viscosity, as oil, used in a hydraulic system.
- hyperfunctional — of or relating to a function or functions: functional difficulties in the administration.
- identifiability — to recognize or establish as being a particular person or thing; verify the identity of: to identify handwriting; to identify the bearer of a check.
- in a family way — pregnant; with child
- in line of duty — in the performance of authorized or prescribed military duty
- indefeasibility — The state or quality of being indefeasible, of being incapable of being defeated.