15-letter words containing s, p, o, r, e, m
- spelling reform — an attempt to change the spelling of English words to make it conform more closely to pronunciation.
- spermatoblastic — relating to a spermatoblast
- spermatogenesis — the origin and development of spermatozoa.
- spirochaetaemia — the presence of spirochaetes in the blood
- sports medicine — a field of medicine concerned with the functioning of the human body during physical activity and with the prevention and treatment of athletic injuries.
- strephosymbolia — a condition of perceiving objects as their mirror image and, specifically, having difficulty in distinguishing letters in words
- sully-prudhomme — René François Armand [ruh-ney frahn-swa ar-mahn] /rəˈneɪ frɑ̃ˈswa arˈmɑ̃/ (Show IPA), 1839–1907, French poet: Nobel prize 1901.
- super-committee — a committee with members from two or more organizations or political groups
- supergovernment — a centralized organization formed by a group of governments to enforce justice or maintain peace.
- superimposition — to impose, place, or set over, above, or on something else.
- superpatriotism — the quality of being superpatriotic
- superphenomenon — a phenomenon that is beyond the typical qualities of phenomena
- supreme council — the legislature of the former Soviet Union and its successor states, consisting of an upper house (Soviet of the Union or Council of the Union) whose delegates are elected on the basis of population, and a lower house (Soviet of Nationalities or Council of Nationalities) whose delegates are elected to represent the various nationalities.
- symmetric group — the group of all permutations of a finite set.
- symphony writer — a composer of an extended large-scale orchestral composition, usually with several movements, at least one of which is in sonata form
- system operator — a person who maintains a computer system or network, especially one who operates a computer bulletin board.
- tetrasporangium — a sporangium containing four asexual spores.
- theriomorphosis — transformation into an animal form, often associated with mythological characters
- thermoperiodism — the effect on an organism of rhythmic fluctuations in temperature.
- to take up arms — If one group or country takes up arms against another, they prepare to attack and fight them.
- ultramicroscope — an instrument that uses scattering phenomena to detect the position of objects too small to be seen by an ordinary microscope.
- un-presumptuous — full of, characterized by, or showing presumption or readiness to presume in conduct or thought, as by saying or doing something without right or permission.
- uncomprehensive — of large scope; covering or involving much; inclusive: a comprehensive study of world affairs.
- uncompromisable — that cannot or should not be compromised
- undercompensate — to compensate or pay less than is fair, customary, or expected.
- 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.
- vernier compass — a compass on a transit (vernier transit) having a vernier for adjusting magnetic bearings to read as true bearings.
- visible imports — products that a company or country buys from other countries