18-letter words containing h, o, t, a, n, d
- runge-kutta method — a numerical method, involving successive approximations, used to solve differential equations.
- saint john's bread — carob (def 2).
- say/kiss goodnight — If you say goodnight to someone or kiss them goodnight, you say something such as 'Goodnight' to them or kiss them before one of you goes home or goes to sleep.
- scratch one's head — If you say that someone is scratching their head, you mean that they are thinking hard and trying to solve a problem or puzzle.
- search-and-destroy — designed to find and destroy by bombing etc
- shorthand notebook — a notebook used by a shorthand writer
- sign of the zodiac — one of the twelve constellations along the path of the ecliptic.
- sindbad the sailor — (in The Arabian Nights' Entertainments), a wealthy citizen of Baghdad who relates the adventures of his seven wonderful voyages.
- sit on one's hands — the terminal, prehensile part of the upper limb in humans and other primates, consisting of the wrist, metacarpal area, fingers, and thumb.
- sodium thiocyanate — a white powder or colorless, deliquescent crystals, NaSCN, used chiefly in organic synthesis and in medicine in the treatment of hypertension.
- solid-fuel heating — heating that uses solid fuel, such as coal or coke
- sound and the fury — a novel (1929) by William Faulkner.
- sound spectrograph — an electronic device for recording a sound spectogram.
- southampton island — an island in N Canada, in the Northwest Territories at the entrance to Hudson Bay. 19,100 sq. mi. (49,470 sq. km).
- southern rhodesian — a former name (until 1964) of Zimbabwe (def 1).
- sow dragon's teeth — to take some action that is intended to prevent strife or trouble but that actually brings it about
- strathclyde region — a former local government region in W Scotland: formed in 1975 from Glasgow, Renfrewshire, Lanarkshire, Buteshire, Dunbartonshire, and parts of Argyllshire, Ayrshire, and Stirlingshire; replaced in 1996 by the council areas of Glasgow, Renfrewshire, East Renfrewshire, Inverclyde, North Lanarkshire, South Lanarkshire, Argyll and Bute, East Dunbartonshire, West Dunbartonshire, North Ayrshire, South Ayrshire, and East Ayrshire
- sutton-in-ashfield — a market town in N central England, in W Nottinghamshire. Pop: 41 951 (2001)
- tan someone's hide — to convert (a hide) into leather, especially by soaking or steeping in a bath prepared from tanbark or synthetically.
- temporary hardness — hardness of water due to the presence of magnesium and calcium hydrogencarbonates, which can be precipitated as carbonates by boiling
- the back of beyond — a very remote place
- the bird has flown — the person in question has fled or escaped
- the damage is done — If you say 'the damage is done', you mean that it is too late now to prevent the harmful effects of something that has already happened.
- the dark continent — a term for Africa when it was relatively unexplored
- the grand national — an annual steeplechase run at Aintree, Liverpool, since 1839
- the hand of fatima — a symbol of a hand used in some Arabic countries to protect against the evil eye, a magical power
- the heavens opened — it started pouring with rain
- the-dark-continent — Africa: so called, especially during the 19th century, because little was known about it.
- thioantimonic acid — a hypothetical acid, H3SbS4, known only in the form of its salts
- thioarsenious acid — any of a group of hypothetical acids, H3AsS3, HAsS2, and H4As2S5, known only in the forms of their salts
- thomas alva edison — Thomas Alva [al-vuh] /ˈæl və/ (Show IPA), 1847–1931, U.S. inventor, especially of electrical devices.
- three-cornered hat — a triangular shaped hat which was popular in the 17th and 18th centuries; its turned up brim formed a gutter for catching rain
- to a grinding halt — If you describe a bad situation as grinding, you mean it never gets better, changes, or ends.
- to be on the radar — to be noticed or important
- to find fault with — If you find fault with something or someone, you look for mistakes and complain about them.
- to pick and choose — If you pick and choose, you carefully choose only things that you really want and reject the others.
- townsend avalanche — avalanche (def 3).
- transit theodolite — a theodolite having a telescope that can be transited.
- turn one's hand to — the terminal, prehensile part of the upper limb in humans and other primates, consisting of the wrist, metacarpal area, fingers, and thumb.
- under one's breath — the air inhaled and exhaled in respiration.
- under the aegis of — guided or protected by
- under the jackboot — If a country or group of people is under the jackboot, they are suffering because the government is cruel and undemocratic.
- urban homesteading — homesteading (def 2).
- water of hydration — the portion of a hydrate that is represented as, or can be expelled as, water: now usually regarded as being in true molecular combination with the other atoms of the compound, and not existing in the compound as water.
- wesleyan methodist — a member of any of the churches founded on the evangelical principles of John Wesley.
- west-northwestward — moving, bearing, facing, or situated toward the west-northwest.
- white-faced hornet — any large, stinging paper wasp of the family Vespidae, as Vespa crabro (giant hornet) introduced into the U.S. from Europe, or Vespula maculata (bald-faced hornet or white-faced hornet) of North America.
- widemouth blindcat — any of several catfishes, as Satan eurystomus (widemouth blindcat) of Texas, that inhabit underground streams and have undeveloped eyes and unpigmented skin.
- woman of the world — a woman experienced and sophisticated in the ways and manners of the world, especially the world of society.