12-letter words containing e, r, o, s, i
- rolling news — current affairs: continuous
- roman strike — a striking mechanism of c1700, giving the equivalent in tones of Roman numerals, a bell of one pitch striking once for each number I, a bell of another pitch striking once for V, twice for X.
- room service — the serving of food, drinks, etc., to a guest in his or her room, as at a hotel.
- rooseveltian — of, pertaining to, advocating, or following the principles, views, or policies of Franklin Delano Roosevelt or of Theodore Roosevelt.
- rooster tail — the wake thrown up behind a speeding boat or the dust thrown up behind a speeding vehicle.
- root version — The initial value of an object in a change management system.
- rose campion — a plant, Lychnis coronaria, of the pink family, having reddish purple flowers, and leaves covered with whitish down.
- rose diamond — a diamond, one side of which is flat, and the other cut into twenty-four triangular facets in two ranges which form a convex face pointed at the top
- rose pogonia — a North American terrestrial orchid, Pogonia ophioglossoides, having a fragrant, usually solitary rose-pink or white flower.
- rosewood oil — a fragrant oil extracted from the wood of a South American tree, Aniba rosaeodora, and used in the manufacture of perfumes.
- rostenkowski — Dan(iel) 1928–2010, U.S. politician: congressman 1959–94.
- royal tennis — court tennis.
- running shoe — trainer, sneaker
- russian zone — a zone in Germany controlled by the Soviet Union 1945–89.
- sacrilegious — pertaining to or involving sacrilege: sacrilegious practices.
- saffron rice — a dish made from white rice and flavoured with the spice saffron
- saint jerome — Saint (Eusebius Hieronymus) a.d. c340–420, Christian ascetic and Biblical scholar: chief preparer of the Vulgate version of the Bible.
- saint-tropez — a town in SE France, on the French Riviera: beach resort.
- salutiferous — salutary.
- sanguiferous — conveying blood, as a blood vessel.
- satin-flower — a Californian plant, Clarkia amoena, of the evening primrose family, having cup-shaped pink or purplish flowers blotched with red.
- savoir faire — knowledge of just what to do in any situation; tact.
- savoir-faire — knowledge of just what to do in any situation; tact.
- savoir-vivre — knowledge of the world and the ways or usages of polite society.
- scatteration — the act of scattering.
- scenographic — the art of representing objects in accordance with the rules of perspective.
- schizophrene — a person with schizophrenia or one who tends toward schizophrenia
- schoenheimer — Rudolf [roo-dolf;; German roo-dawlf] /ˈru dɒlf;; German ˈru dɔlf/ (Show IPA), 1898–1941, U.S. biochemist, born in Germany.
- schooner rig — a rig in which the mainmast is taller than the foremast
- sclerodermic — of or relating to a scleroderm or to sclerodermia; hard-skinned
- scolopendrid — any myriapod of the order Scolopendrida, including many large, poisonous centipedes.
- scopes trial — John Thomas, 1901–70, U.S. high-school teacher whose teaching of the Darwinian theory of evolution became a cause célèbre (Scopes Trial or Monkey Trial) in 1925.
- scorekeeping — an official of a sports contest who keeps record of the score.
- scrieveboard — the drawing board of a shipbuilder
- scrive board — a floorlike construction on which the lines of a vessel can be drawn or scribed at full size.
- scrobiculate — furrowed or pitted.
- sea crossing — a journey by sea from one coast to another
- sea milkwort — a maritime plant, Glaux maritima, having small, pinkish-white flowers.
- sea scorpion — scorpionfish.
- secobarbital — a white, odorless, slightly bitter powder, C 1 2 H 1 8 N 2 O 3 , used as a sedative and hypnotic.
- second birth — spiritual rebirth.
- second reich — the German Empire 1871–1919.
- section mark — section (def 16).
- seismography — the scientific measuring and recording of the shock and vibrations of earthquakes.
- seismometric — of or relating to seismometry or a seismometer
- seleniferous — containing or yielding selenium.
- self-proving — to establish the truth or genuineness of, as by evidence or argument: to prove one's claim.
- self-worship — reverent honor and homage paid to God or a sacred personage, or to any object regarded as sacred.
- semi-dormant — lying asleep or as if asleep; inactive, as in sleep; torpid: The lecturer's sudden shout woke the dormant audience.
- semi-organic — noting or pertaining to a class of chemical compounds that formerly comprised only those existing in or derived from plants or animals, but that now includes all other compounds of carbon.