15-letter words containing i, n, f, r
- island grey fox — a similar and related animal, U. littoralis, inhabiting islands off North America
- ivano-frankovsk — a city in W Ukraine, S of Lvov.
- jefferson davis — Alexander Jackson, 1803–92, U.S. architect.
- jeffersonianism — pertaining to or advocating the political principles and doctrines of Thomas Jefferson, especially those stressing minimum control by the central government, the inalienable rights of the individual, and the superiority of an agrarian economy and rural society.
- john of austria — ("Don John") 1547?–78, Spanish naval commander and general: victor at the battle of Lepanto.
- joint favourite — one of two or more competitors in a race or contest that are considered equally likely to win
- kingsford-smith — Sir Charles (Edward). 1897–1935, Australian aviator and pioneer (with Charles Ulm) of trans-Pacific and trans-Tasman flights
- knife-sharpener — a kitchen implement that is used to sharpen knives
- land of promise — Promised Land.
- lay a finger on — to harm
- left outer join — outer join
- left-hand drive — A left-hand drive vehicle has the steering wheel on the left side, and is designed to be used in countries where people drive on the right-hand side of the road.
- legion of honor — a French order of distinction instituted in 1802 by Napoleon with membership being granted for meritorious civil or military services.
- legion of merit — a decoration ranking below the Silver Star and above the Distinguished Flying Cross, awarded to U.S. and foreign military personnel for exceptionally meritorious conduct in the performance of outstanding services to the U.S.
- liaison officer — a person who liaises between groups or units
- limiting factor — Physiology. the slowest, therefore rate-limiting, step in a process or reaction involving several steps.
- linear function — linear transformation.
- linear manifold — subspace (def 2b).
- linguistic form — any meaningful unit of speech, as a sentence, phrase, word, morpheme, or suffix.
- liquid paraffin — a colourless almost tasteless oily liquid obtained by petroleum distillation and used as a laxative
- loft conversion — an extra room added to a house by converting the roof space
- longshore drift — beach drift.
- magnesioferrite — (mineralogy) A magnesium iron oxide mineral, a member of the magnetite series of spinels, which forms black metallic octahedral crystals.
- maid of orléans — Saint ("the Maid of Orléans") 1412?–31, French national heroine and martyr who raised the siege of Orléans.
- maidenhair fern — any fern of the cosmopolitan genus Adiantum, esp A. capillis-veneris, having delicate fan-shaped fronds with small pale-green leaflets: family Adiantaceae
- make certain of — to ensure (that one will get something); confirm
- malconformation — Imperfect, disproportionate, or abnormal formation; disproportion of parts.
- man of his word — a unit of language, consisting of one or more spoken sounds or their written representation, that functions as a principal carrier of meaning. Words are composed of one or more morphemes and are either the smallest units susceptible of independent use or consist of two or three such units combined under certain linking conditions, as with the loss of primary accent that distinguishes black·bird· from black· bird·. Words are usually separated by spaces in writing, and are distinguished phonologically, as by accent, in many languages.
- man-made fabric — a type of fabric that is made artificially, such as polyester or rayon, rather than occurring naturally, like cotton or wool
- man-of-war bird — frigate bird.
- man-of-war fish — a small, tropical fish, Nomeus gronovii, that lives among the tentacles of the Portuguese man-of-war.
- margin of error — statistics: variance
- marie de france — flourished 12th century, French poet in England.
- meissner effect — the loss of magnetism that a superconductor displays when cooled to its transition temperature in a magnetic field.
- member function — A method in C++.
- metainformation — metadata
- mezzanine floor — intermediate level in a building
- microcentrifuge — A centrifuge used in laboratories to separate materials from small samples (especially of biological material).
- microfiltration — Filtration through a microporous membrane.
- mis-informative — to give false or misleading information to.
- mistrustfulness — Quality of being mistrustful.
- moccasin flower — the lady's-slipper.
- molecular knife — a segment of genetic material that inhibits the reproduction of the AIDS virus by breaking up specific areas of the virus's genes.
- moreton bay fig — a large Australian fig tree, Ficus macrophylla, having glossy leaves and smooth bark
- mortiferousness — deadliness
- nanofabrication — the design and manufacture of products and structures, especially electronic devices, with dimensions measured in nanometers.
- narcotrafficker — One who traffics in illegal narcotics.
- national forest — forested land owned, maintained, and preserved by the U.S. government.
- negative profit — a financial loss
- neurofibrillary — Of or pertaining to a neurofibril.