15-letter words containing m, a, s, o, r
- transmissometer — an instrument for measuring visibility or the transmission of light in the atmosphere.
- trout fisherman — a fisherman who catches trout
- trypanosomiasis — any infection caused by a trypanosome.
- tutorial system — a system of education, especially in some colleges, in which instruction is given personally by tutors, who also act as general advisers of a small group of students in their charge.
- twist one's arm — to combine, as two or more strands or threads, by winding together; intertwine.
- ultra-modernist — very advanced in ideas, design, or techniques.
- ultramicroscope — an instrument that uses scattering phenomena to detect the position of objects too small to be seen by an ordinary microscope.
- ultramicroscopy — the use of the ultramicroscope.
- uncompromisable — that cannot or should not be compromised
- undemonstrative — not given to open exhibition or expression of emotion, especially of affection.
- undercompensate — to compensate or pay less than is fair, customary, or expected.
- underestimation — to estimate at too low a value, rate, or the like.
- universal motor — a series-wound motor, of one-half horsepower or less, using alternating or direct current.
- unsportsmanlike — a man who engages in sports, especially in some open-air sport, as hunting, fishing, racing, etc.
- upperclasswoman — An upperclasswoman is a junior or senior student in a high school, college, or university.
- ust-kamenogorsk — a city in E Kazakhstan, on the Irtysh River.
- vermouth cassis — a mixed drink made with dry vermouth, crème de cassis, soda or mineral water, and cracked ice.
- vernier compass — a compass on a transit (vernier transit) having a vernier for adjusting magnetic bearings to read as true bearings.
- villeda morales — Ramón [rah-mawn] /rɑˈmɔn/ (Show IPA), 1909?–71, Honduran diplomat and statesman: president 1957–63.
- 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
- wee small hours — the hours just after midnight
- x-ray astronomy — the branch of astronomy that studies celestial objects by means of the x-rays emitted by them.
- zermelo's axiom — axiom of choice.