19-letter words containing h, o, r, t

mushroom ventilator — a ventilator having at the top of a vertical shaft a broad rounded cap that can be screwed down to close it.
napierian logarithm — natural logarithm.
nathaniel hawthorne — Nathaniel, 1804–64, U.S. novelist and short-story writer.
national characters — (character) Characters with accents and other diacritical marks that are used in certain written languages (that are based on the Roman alphabet) but not in others, particularly not in English. A standard list is ISO Latin 1.
natural catastrophe — A natural catastrophe is an unexpected event, caused by nature, such as an earthquake or flood, in which there is a lot of suffering, damage, or death.
near to one's heart — cherished or important
neighbourhood watch — a scheme under which members of a community agree together to take responsibility for keeping an eye on each other's property, as a way of preventing crime
nernst heat theorem — the principle that reactions in crystalline solids involve changes in entropy that tend to zero as the temperature approaches absolute zero
nerve growth factor — a protein that promotes the growth, organization, and maintenance of sympathetic and some sensory nerve cells. Abbreviation: NGF.
neuropathologically — In a neuropathologic way.
next door neighbour — a person who lives in the house, flat, etc, next to one's home
niagara-on-the-lake — a town in SE Ontario, in S Canada, on Lake Ontario, at the mouth of the Niagara River, on the border between Canada and New York.
no shrinking violet — If you say that someone is no shrinking violet, you mean that they are not at all shy.
no strings attached — without conditions
nonplayer character — a character in a tabletop role-playing game who is controlled by the Game Master.
nonthrombocytopenic — Not thrombocytopenic.
nordrhein-westfalen — German name of North Rhine-Westphalia.
north new hyde park — a town on W Long Island, in SE New York.
north pacific ocean — the northern part of the Pacific Ocean, extending from the equator to the Arctic Ocean.
north valley stream — a town on W Long Island, in SE New York.
north-central state — a state of N Nigeria. Capital: Kaduna. Pop: 4 438 007 (1995 est). Area: 46 053 sq km (17 781 sq miles)
north-northeasterly — a wind or storm coming from the north-northeast
north-northwesterly — a wind or storm coming from the north-northwest
north-west frontier — the area roughly equivalent to the present North-West Frontier Province of Pakistan, which is the days of the British Raj was regarded as one of the most remote and dangerous outposts of the British Empire
northern hemisphere — the half of the earth between the North Pole and the equator.
northern hog sucker — black sucker.
northwest ordinance — the act of Congress in 1787 providing for the government of the Northwest Territory and setting forth the steps by which its subdivisions might become states.
northwest territory — region north of the Ohio River, between Pa. & the Mississippi (established 1787): it now forms Ohio, Ind., Ill., Mich., Wis., & part of Minn.
not for much longer — if something will not happen for much longer, it will soon stop happening
not worth a cracker — worthless; useless
not worth a crumpet — utterly worthless
nothing of the sort — not at all as described
noughts and crosses — tick-tack-toe (def 1).
noughts-and-crosses — tick-tack-toe (def 1).
occupational hazard — a danger or hazard to workers that is inherent in a particular occupation: Silicosis is an occupational hazard of miners.
officer of the deck — a naval duty officer responsible for the operation of the ship in the absence of the captain or the executive officer. Abbreviation: O.O.D.
okeechobee waterway — a waterway in S Florida from the Atlantic Ocean to the Gulf of Mexico. 155 miles (244 km) long.
old english pattern — a spoon pattern having a stem curving backward at the end.
olive-backed thrush — Swainson's thrush.
on the baker's list — in good health
on the razor's edge — a sharp-edged instrument used especially for shaving the face or trimming the hair.
on the threshold of — If you are on the threshold of something exciting or new, you are about to experience it.
on top of the world — the highest or loftiest point or part of anything; apex; summit. Synonyms: zenith, acme, peak, pinnacle, vertex. Antonyms: bottom, base, foot, lowest point.
on-the-job training — apprenticeship, learning by doing
one after the other — one at a time
one way and another — on balance
one's money's worth — full value for the money one has paid for something
open-hearth furnace — a process of steelmaking in which the charge is laid in a furnace (open-hearth furnace) on a shallow hearth and heated directly by burning gas as well as radiatively by the furnace walls.
open-hearth process — a process of steelmaking in which the charge is laid in a furnace (open-hearth furnace) on a shallow hearth and heated directly by burning gas as well as radiatively by the furnace walls.
operations research — the analysis, usually involving mathematical treatment, of a process, problem, or operation to determine its purpose and effectiveness and to gain maximum efficiency.

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