13-letter words containing o, n, s, m
- kerosene lamp — light fuelled by paraffin
- kim young sam — born 1927, president of South Korea 1993–98.
- king's ransom — an extremely large amount of money: The painting was sold for a king's ransom.
- kleptomaniacs — Plural form of kleptomaniac.
- krishna menon — Vengalil Krishnan [ven-gah-leel krish-nuh n] /vɛnˈgɑ lil ˈkrɪʃ nən/ (Show IPA), 1897–1974, Indian politician and statesman.
- lamb's tongue — a molding having a deep, symmetrical profile ending in a narrow edge, as in a sash bar.
- lambeosaurine — Any crested hadrosaurid dinosaur of the subfamily Lambeosaurinae.
- lamellaphones — Plural form of lamellaphone.
- laminectomies — Plural form of laminectomy.
- laryngotomies — Plural form of laryngotomy.
- leishmaniosis — Alt form leishmaniasis.
- leptomeninges — The inner two meninges, the arachnoid and the pia mater, between which circulates the cerebrospinal fluid.
- liberationism — the principles of liberationists
- lighthouseman — a lighthouse keeper
- lightsomeness — (archaic) The quality of being lightsome.
- lithesomeness — the quality of being flexible and supple
- loathsomeness — The property or nature that gives rise to revulsion, that inspires loathing.
- lowerclassman — underclassman.
- lowerclassmen — underclassman.
- luminous flux — the rate of transmission of luminous energy: expressed in lumens.
- lymphangiomas — Plural form of lymphangioma.
- macro-segment — a stretch of speech preceded and followed but not interrupted by a pause.
- macrodynamics — Large-scale dynamics.
- macroorganism — an organism that can be seen with the naked eye.
- magnanimously — In a magnanimous manner; with greatness of mind.
- magnesiferous — (geology) Containing magnesium.
- magnet school — a public school with special programs and instruction that are not available elsewhere in a school district and that are specially designed to draw students from throughout a district, especially to aid in desegregation.
- magnetiferous — (dated) Producing or conducting magnetism.
- magnetisation — Alternative spelling of magnetization.
- magnetographs — Plural form of magnetograph.
- magnetometers — Plural form of magnetometer.
- magnetooptics — the branch of physics that deals with magnetooptic phenomena.
- magnetosheath — the region between the magnetopause of the earth or of some other planet and the shock front caused by the solar wind.
- magnetosphere — the outer region of the earth's ionosphere, where the earth's magnetic field controls the motion of charged particles, as in the Van Allen belts. Compare magnetopause.
- magnetostatic — Of or pertaining to magnetostatics.
- magnitudinous — size; extent; dimensions: to determine the magnitude of an angle.
- magnoliaceous — belonging to the plant family Magnoliaceae.
- make no bones — If you make no bones about something, you talk openly about it, rather than trying to keep it a secret.
- make position — the situation in which a short vowel may be regarded as long, that is, when it occurs before two or more consonants
- malabsorbtion — Misspelling of malabsorption.
- malabsorption — faulty absorption of nutritive material from the intestine.
- malacostracan — belonging or pertaining to the crustacean subclass Malacostraca, which includes the lobsters, shrimps, crabs, etc.
- maladroitness — lacking in adroitness; unskillful; awkward; bungling; tactless: to handle a diplomatic crisis in a very maladroit way.
- malformations — Plural form of malformation.
- maliciousness — full of, characterized by, or showing malice; intentionally harmful; spiteful: malicious gossip.
- managed bonds — investment in a combination of fixed interest securities, equities, gilts, and property, in which an investment manager, acting on a client's behalf, varies the amount invested in each according to the returns expected
- mandatoriness — The quality or state of being mandatory.
- manganiferous — containing manganese.
- mango madness — the irrational behaviour of a person suffering from the effects of living in tropical heat
- manifestation — an act of manifesting.