13-letter words containing l, f, r
- fortuneteller — a person who claims the ability to predict the future.
- forward delta — The delta which, when combined with a version, creates a child version. See change management
- forward slash — a short oblique stroke (/), or slash, especially one used in computer programming or to specify an Internet address or computer filename.
- fossil energy — heat energy released by burning fossil fuel
- fossiliferous — bearing or containing fossils, as rocks or strata.
- foul-tempered — frequently and unnecessarily sullen or angry
- four-wheeling — traveling in a vehicle using four-wheel drive.
- foursome reel — a lively Scottish dance for two couples who combine in square and circular formations
- fowler's toad — an eastern U.S. toad, Bufo woodhousii fowleri, having an almost patternless white belly.
- fractionalise — Alt form fractionalize.
- fractionalism — the state of being separate or inharmonious
- fractionalist — an advocate or supporter of fractionalism
- fractionalize — Divide (someone or something) into separate groups or parts.
- fractocumulus — low ragged slightly bulbous cloud, often appearing below nimbostratus clouds during rain
- fragmentarily — consisting of or reduced to fragments; broken; disconnected; incomplete: fragmentary evidence; fragmentary remains.
- frank whittle — Sir Frank, 1907–96, English engineer and inventor.
- frankenthaler — Helen, 1928–2011, U.S. painter.
- franklin park — a city in NE Illinois, near Chicago.
- franklin tree — a deciduous tree, Franklinia alatamaha, having large, white, fragrant flowers, one of the rarest trees in the world, once native only to Georgia and now known only in cultivation.
- fraser island — an island off the south-east coast of Queensland and the largest sand island in the world; contains rainforests, heathlands, and freshwater lakes; a national park (since 1976) and a World Heritage site (since 1992). Area: 1840 sq km (710 sq miles). Pop: 194 (2011)
- freckle-faced — having a face conspicuously covered with freckles.
- free climbing — climbing without using pitons, étriers, etc, as direct aids to ascent, but using ropes, belays, etc, at discretion for security
- free delivery — the delivery of mail directly to the recipient's address without charge to the recipient: Before free delivery people had to pick up their mail at the post office or pay a letter carrier to deliver it.
- free electron — an electron that is not attached to an atom or molecule and is free to respond to outside forces.
- free enthalpy — a thermodynamic property of a system equal to the difference between its enthalpy and the product of its temperature and its entropy. It is usually measured in joules
- free variable — (in functional calculus) a variable occurring in a sentential function and not within the scope of any quantifier containing it.
- free-floating — (of an emotional state) lacking an apparent cause, focus, or object; generalized: free-floating hostility.
- free-wheeling — operating in the manner of a freewheel.
- freight plane — an aeroplane used to transport goods
- frelinghuysen — Frederick Theodore, 1817–85, U.S. statesman.
- french letter — a condom.
- french polish — French polish is a type of varnish which is painted onto wood so that the wood has a hard shiny surface.
- french-polish — to finish or treat (a piece of furniture) with French polish.
- freudian slip — (in Freudian psychology) an inadvertent mistake in speech or writing that is thought to reveal a person's unconscious motives, wishes, or attitudes.
- friction pile — a pile depending on the friction of surrounding earth for support.
- friendly fire — Insurance. a fire deliberately set and remaining contained, as in a fireplace or boiler, from which any resulting loss cannot be claimed as an insurance liability (opposed to hostile fire).
- frighteningly — to make afraid or fearful; throw into a fright; terrify; scare.
- frightfulness — The quality of being frightful.
- fringilliform — resembling a finch
- frise aileron — an aircraft wing control surface designed with its leading edge extending forward of its axis of rotation so that when the aileron's trailing edge is raised the leading edge extends below the bottom surface of the wing.
- frivolousness — characterized by lack of seriousness or sense: frivolous conduct.
- front-loading — Also, front-loaded. front-loading (def 1).
- frontal gyrus — any of several convolutions on the outer surface of the frontal lobe of the cerebrum.
- frontopalatal — articulated with the portion of the tongue that is just behind the tip touching or near the alveolar ridge and hard palate, as ( (ʃ) ; sh) ) and (; ʒ) ; zh) )
- frosted glass — etched glass with a translucent surface
- fruitlessness — The quality of being fruitless.
- frustratingly — to make (plans, efforts, etc.) worthless or of no avail; defeat; nullify: The student's indifference frustrated the teacher's efforts to help him.
- fuel air bomb — a type of bomb that spreads a cloud of gas, which is then detonated, over the target area, causing extensive destruction
- fuel injector — injector (def 2b).
- fulani empire — a powerful W African Muslim state that flourished in the 19th century in the area of present-day Nigeria.