18-letter words containing r, o, a, d, h, u
- rheims-douay bible — Douay Bible.
- runge-kutta method — a numerical method, involving successive approximations, used to solve differential equations.
- sound and the fury — a novel (1929) by William Faulkner.
- sound spectrograph — an electronic device for recording a sound spectogram.
- southern rhodesian — a former name (until 1964) of Zimbabwe (def 1).
- theodore gericault — (Jean Louis André) Théodore [zhahn lwee ahn-drey tey-aw-dawr] /ʒɑ̃ lwi ɑ̃ˈdreɪ teɪ ɔˈdɔr/ (Show IPA), 1791–1824, French painter.
- thioarsenious acid — any of a group of hypothetical acids, H3AsS3, HAsS2, and H4As2S5, known only in the forms of their salts
- thiosulphuric acid — an unstable acid known only in solutions and in the form of its salts. Formula: H2S2O3
- to cut the mustard — If someone does not cut the mustard, their work or their performance is not as good as it should be or as good as it is expected to be.
- to hold your peace — If you hold or keep your peace, you do not speak, even though there is something you want or ought to say.
- 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.
- ur of the chaldees — the city where Abraham was born, sometimes identified with the Sumerian city of Ur. Gen. 11:28, 31; 15:7; Neh. 9:7.
- urban homesteading — homesteading (def 2).
- west-southwestward — moving, bearing, facing, or situated toward the west-southwest.
- xenon hexafluoride — a colorless, crystalline compound, XeF 6 , that melts at 50°C to a yellow liquid, and boils at 75°C.