15-letter words that end in or
- solar collector — any of numerous devices or systems designed to capture and use solar radiation for heating air or water and for producing steam to generate electricity.
- sole proprietor — only owner
- spark generator — an alternating-current power source with a condenser discharging across a spark gap.
- speed indicator — an instrument for counting the number of revolutions of a gasoline engine.
- steam generator — steam-producing power plant
- sub-distributor — a person or thing that distributes.
- sumatra camphor — borneol.
- surge protector — a small device to protect a computer, telephone, television set, or the like from damage by high-voltage electrical surges.
- system operator — a person who maintains a computer system or network, especially one who operates a computer bulletin board.
- tertiary sector — The tertiary sector consists of industries which provide a service, such as transport and finance.
- thermal equator — an imaginary line round the earth running through the point on each meridian with the highest average temperature. It lies mainly to the north because of the larger landmasses and therefore greater summer heating
- thermal reactor — a nuclear reactor in which most of the fission is caused by thermal neutrons
- town councillor — member of municipal government
- transfer factor — a lymphocyte product that, when extracted from T cells of an individual with immunity to a particular antigen, can confer that immunity when administered to another individual of the same species.
- trial and error — experimentation or investigation in which various methods or means are tried and faulty ones eliminated in order to find the correct solution or to achieve the desired result or effect.
- unaccounted for — If people or things are unaccounted for, you do not know where they are or what has happened to them.
- unaccounted-for — not accounted for; not understood; unexplained: an explosion resulting from some unaccounted-for mechanical failure.
- universal donor — a person with blood of group O.
- universal motor — a series-wound motor, of one-half horsepower or less, using alternating or direct current.
- unskilled labor — work that requires practically no training or experience for its adequate or competent performance.
- vasoconstrictor — a nerve or drug that causes vasoconstriction.
- vice chancellor — a substitute, deputy, or subordinate chancellor.
- vice-chancellor — a substitute, deputy, or subordinate chancellor.
- waddesdon manor — a mansion near Aylesbury in Buckinghamshire: built (1880–89) in the French style for the Rothschild family: noted for its furnishings and collections of porcelain and paintings
- weekend warrior — a reservist who attends weekend meetings of his or her unit in order to fulfill military obligations.
- worker director — a worker elected to the governing board of a business concern to represent the interests of the employees in decision making