15-letter words containing r, o, t, h, l
- free throw line — foul line (def 2).
- french togoland — a former United Nations Trust Territory in W Africa, administered by France (1946–60), now the independent republic of Togo
- friction clutch — a clutch in which one part turns another by friction between them.
- fusospirochetal — Relating to fusospirochetes.
- geochronologist — A geologist whose speciality is geochronology.
- geomorphologist — A geologist whose speciality is geomorphology.
- geostrophically — By means of, or in terms of, geostrophy.
- globe artichoke — artichoke (defs 1, 2).
- gloucestershire — a county in SW England. 1255 sq. mi. (2640 sq. km). County seat: Gloucester.
- go through hell — If you go through hell, or if someone puts you through hell, you have a very difficult or unpleasant time.
- gödel's theorem — either of two theorems published by the mathematician Kurt Gödel in 1931 that prove all mathematical systems are incomplete in that their truth or consistency can only be proved using a system of a higher order
- golden starfish — an award given to a bathing beach that meets EU standards of cleanliness
- graduate school — a school, usually a division of a university, offering courses leading to degrees more advanced than the bachelor's degree.
- grind to a halt — If a country's economy or something such as a process grinds to a halt, it gradually becomes slower or less active until it stops.
- gulf of corinth — an inlet of the Ionian Sea between the Peloponnese and central Greece
- half-understood — partially understood
- halting problem — The problem of determining in advance whether a particular program or algorithm will terminate or run forever. The halting problem is the canonical example of a provably unsolvable problem. Obviously any attempt to answer the question by actually executing the algorithm or simulating each step of its execution will only give an answer if the algorithm under consideration does terminate, otherwise the algorithm attempting to answer the question will itself run forever. Some special cases of the halting problem are partially solvable given sufficient resources. For example, if it is possible to record the complete state of the execution of the algorithm at each step and the current state is ever identical to some previous state then the algorithm is in a loop. This might require an arbitrary amount of storage however. Alternatively, if there are at most N possible different states then the algorithm can run for at most N steps without looping. A program analysis called termination analysis attempts to answer this question for limited kinds of input algorithm.
- hamiltonstovare — a large strong short-haired breed of hound with a black, brown, and white coat
- hard-luck story — a story of misfortune designed to elicit sympathy
- helicopter view — an overview of a situation without any details
- heliocentricity — measured or considered as being seen from the center of the sun.
- heliometrically — By means of, or in terms of, heliometry.
- heterocercality — the condition or state of having a heterocercal tail
- heterodactylous — having the first and fourth toes directed backward, and the second and third forward, as in trogons.
- heterofullerene — (chemistry) Any compound formally derived from a fullerene by replacing one or more carbon atom by a heteroatom.
- heterogeneously — different in kind; unlike; incongruous.
- heterosexualism — Discrimination of non-heterosexual people on the basis of their sexual orientation.
- heterosexuality — sexual feeling or behavior directed toward a person or persons of the opposite sex.
- heterotolerance — (immunology) Subsequent unresponsiveness to a different agonist.
- hexahydrothymol — menthol.
- high resolution — a great amount of detail visible in a photographic, TV, or video image
- high-resolution — having or capable of producing an image characterized by fine detail: high-resolution photography; high-resolution lens.
- histomorphology — histology.
- historical cost — The historical cost of an asset is its original cost when it was first acquired by a company.
- holding pattern — a traffic pattern for aircraft at a specified location (holding point) where they are ordered to remain until permitted to land or proceed.
- holiday traffic — increased road traffic during holiday periods and public holidays
- holocrystalline — (of igneous rocks) having only crystalline components and no glass
- hopeful monster — a hypothetical individual organism that, by means of a fortuitous macromutation permitting an adaptive shift to a new mode of life, becomes the founder of a new type of organism and a vehicle of macroevolution.
- horatius cocles — a legendary Roman hero of the 6th century bc, who defended a bridge over the Tiber against Lars Porsena
- horizontal well — A horizontal well is a well which has sections that have been drilled at more than 80 degrees from the vertical in order to penetrate a greater length of the reservoir.
- horse artillery — cavalry equipped with artillery
- horse latitudes — the latitudes near 30°N or 30°S at sea, characterized by baffling winds, calms, and high barometric pressure
- horticulturally — With respect to horticulture.
- horticulturists — Plural form of horticulturist.
- hospital corner — a fold on a bed sheet or blanket made by tucking the foot or head of the sheet straight under the mattress with the ends protruding and then making a diagonal fold at the side corner of the sheet and tucking this under to produce a triangular corner.
- hospital doctor — a hospital doctor works in a hospital, rather than as a general practitioner, in the army, etc
- host-host layer — transport layer
- hostess trolley — a trolley, usually wheeled, on which to keep food warm until the hostess is ready to serve it
- hot-air balloon — passenger balloon
- human relations — the study of group behavior for the purpose of improving interpersonal relationships, as among employees.