15-letter words containing o, s, n, a
- mental hospital — psychiatric institution
- mephistophelean — Medieval Demonology. one of the seven chief devils and the tempter of Faust.
- mephistophelian — Medieval Demonology. one of the seven chief devils and the tempter of Faust.
- metropolitanism — of, noting, or characteristic of a metropolis or its inhabitants, especially in culture, sophistication, or in accepting and combining a wide variety of people, ideas, etc.
- microaggression — a subtle but offensive comment or action directed at a minority or other nondominant group that is often unintentional or unconsciously reinforces a stereotype: microaggressions such as "I don't see you as black.".
- microsporangium — a sporangium containing microspores.
- milk of almonds — almond milk.
- millionairesses — Plural form of millionairess.
- miniaturisation — Alternative spelling of miniaturization.
- mis-informative — to give false or misleading information to.
- misappreciation — failure to appreciate something fully or properly
- misapprehension — misunderstanding.
- misarticulation — an act or the process of articulating: the articulation of a form; the articulation of a new thought.
- miscalculations — Plural form of miscalculation.
- miscegenational — of or relating to miscegenation
- miscellaneously — In a miscellaneous manner.
- miscommunicated — Simple past tense and past participle of miscommunicate.
- miscoordinating — of the same order or degree; equal in rank or importance.
- miscoordination — Lack of coordination.
- misregistration — the act of registering.
- misvocalization — an incorrect or bad vocalization
- mitral stenosis — abnormal narrowing of the mitral valve usually resulting from disease, as rheumatic fever, and obstructing the free flow of blood from the atrium to the ventricle.
- moccasin flower — the lady's-slipper.
- mohandas gandhi — Indira [in-deer-uh] /ɪnˈdɪər ə/ (Show IPA), 1917–84, Indian political leader: prime minister 1966–77 and 1980–84 (daughter of Jawaharlal Nehru).
- mole salamander — ambystomid.
- monkey, scratch — scratch monkey
- monochlamydeous — (of a flower) having a perianth of one whorl of members; not having a separate calyx and corolla
- monoculturalism — The practice of actively preserving a culture to the exclusion of external influences.
- monosaccharides — Plural form of monosaccharide.
- monospaced type — a typeface in which the width of all letters, including the space around them, is the same
- monosyllabicity — The state or characteristic of being monosyllabic.
- monounsaturated — of or noting a class of fats that lack a hydrogen bond at one point on the carbon chain and that are associated with a low cholesterol content of the blood.
- montes riphaeus — a mountain range in the third quadrant of the visible face of the moon.
- morale-boosting — A morale-boosting action or event makes people feel more confident and cheerful.
- morelos y pavon — José María [haw-se mah-ree-ah] /hɔˈsɛ mɑˈri ɑ/ (Show IPA), 1765–1815, Mexican priest and revolutionary leader.
- moreton bay ash — an Australian eucalyptus tree, E. tessellaris, having drooping branches and grey bark
- morning prayers — early-morning act of religious worship
- morphosyntactic — involving both morphology and syntax.
- most honourable — a courtesy title applied to marquesses and members of the Privy Council and the Order of the Bath
- motor insurance — insurance for a motor vehicle such as a car, which provides protection against loss in the event of an accident, theft, etc
- mount parnassus — a mountain in central Greece, in NW Boeotia: in ancient times sacred to Dionysus, Apollo, and the Muses, with the Castalian Spring and Delphi on its slopes. Height: 2457 m (8061 ft)
- mount suribachi — a volcanic hill in the Volcano Islands, on Iwo Jima: site of a US victory (1945) over the Japanese in World War II
- mountain rescue — search and rescue conducted on a mountain, for example of someone who has fallen, got lost, etc
- mountainousness — The quality of being mountainous.
- moving sidewalk — a moving surface, similar to a conveyor belt, for carrying pedestrians.
- moving stairway — escalator (def 1).
- mucosanguineous — containing or made up of blood and mucus
- mucous membrane — a lubricating membrane lining an internal surface or an organ, as the alimentary, respiratory, and genitourinary canals.
- mules operation — the surgical removal of folds of skin in the breech of a sheep to reduce blowfly strike
- multidivisional — Of or pertaining to more than one division.