15-letter words containing s, o, u, r, d, i
- spawning ground — a place where fish deposit their eggs for fertilization
- stamping ground — a habitual or favorite haunt.
- stomping ground — a habitual or favorite haunt.
- strontium oxide — a white insoluble solid substance used in making strontium salts and purifying sugar. Formula: SrO
- studio portrait — a photograph of a person taken in a studio
- sub-distributor — a person or thing that distributes.
- subsidiary coin — a coin, especially one made of silver, having a value less than that of the monetary unit.
- sulfur trioxide — an irritant, corrosive, low-melting solid, SO 3 , obtained by the oxidation of sulfur dioxide, used as an intermediate in the manufacture of sulfuric acid.
- sulphur dioxide — a colourless soluble pungent gas produced by burning sulphur. It is both an oxidizing and a reducing agent and is used in the manufacture of sulphuric acid, the preservation of a wide range of foodstuffs (E220), bleaching, and disinfecting. Formula: SO2
- sulphurous acid — an unstable acid produced when sulphur dioxide dissolves in water: used as a preservative for food and a bleaching agent. Formula: H2SO3
- summer holidays — the time when children do not go to school in the summer
- superconfidence — great or extreme confidence, overconfidence
- superordination — Logic. the relation between a universal proposition and a particular proposition of the same quality containing the same terms in the same order.
- suppressor grid — an electrode placed between the screen grid and anode of a valve. Its negative potential, relative to both screen and anode, prevents secondary electrons from the anode reaching the screen
- thermodiffusion — thermal diffusion.
- torsion modulus — a coefficient of elasticity of a substance, expressing the ratio between the force per unit area (shearing stress) that laterally deforms the substance and the shear (shearing strain) that is produced by this force.
- tricotyledonous — having three cotyledons.
- turn inside out — If you say that something has been turned inside out, you mean that it is the opposite of what you expect or think it should be.
- two-thirds rule — a former rule in the Democratic Party, effective 1832–1936, requiring a vote of at least two thirds of its national convention delegates to nominate a presidential and vice-presidential candidate.
- ultra-modernist — very advanced in ideas, design, or techniques.
- ultrafastidious — extremely fastidious
- un-considerable — rather large or great in size, distance, extent, etc.: It cost a considerable amount. We took a considerable length of time to decide.
- unconstrainedly — in an unconfined manner
- uncorresponding — identical in all essentials or respects: corresponding fingerprints.
- undemonstrative — not given to open exhibition or expression of emotion, especially of affection.
- under suspicion — suspected of a crime
- underestimation — to estimate at too low a value, rate, or the like.
- undress uniform — a uniform worn on other than formal occasions.
- universal donor — a person with blood of group O.
- unknown soldier — an unidentified soldier killed in battle and buried with honors, the tomb serving as a memorial to all the unidentified dead of a nation's armed forces. The tomb of the American Unknown Soldier, commemorating a serviceman killed in World War I, was established in the Arlington National Cemetery in Virginia in 1921. In 1958, the remains of personnel of World War II and the Korean War were buried alongside the tomb (now called the Tomb of the Unknowns, ). In 1984, a serviceman of the Vietnam War was interred next to the others.
- unpolished rice — a partly refined rice, hulled and deprived of its germ but retaining some bran.
- unskilled labor — work that requires practically no training or experience for its adequate or competent performance.