11-letter words containing o, p, e, n
- job printer — a printer who does letterheads, invoices, announcements, and other miscellaneous work, as distinguished from one who works solely on books, periodicals, etc.
- john scopes — John Thomas, 1901–70, U.S. high-school teacher whose teaching of the Darwinian theory of evolution became a cause célèbre (Scopes Trial or Monkey Trial) in 1925.
- josephinite — a mineral alloy of nickel and iron
- juniper oil — an oil obtained from the berries or wood of the common juniper, Juniperus communis.
- keogh plans — a pension plan for an unincorporated business entity or self-employed person.
- ketopentose — (carbohydrate) A pentose that is also a ketose.
- kiddie porn — child pornography.
- kinetograph — a camera for taking pictures for a kinetoscope.
- kinetoplast — A mass of mitochondrial DNA lying close to the nucleus in some flagellate protozoa.
- kinetoscope — an early motion-picture device, invented by Edison, in which the film passed behind a peephole for viewing by a single viewer.
- kleptomania — an irresistible impulse to steal, stemming from emotional disturbance rather than economic need.
- knife-point — the sharp tip of a knife.
- knifepoints — Plural form of knifepoint.
- knoop scale — a scale of hardness based on the indentation made in the material to be tested by a diamond point.
- knotty pine — pine wood with many knots
- kohl pencil — a thin cylindrical cosmetic instrument used to darken the area around the eyes
- leap second — Coordinated Universal Time
- leopardskin — the skin of a leopard
- lepidosiren — a lungfish, Lepidosiren paradoxa, of the Amazon, having an eel-shaped body.
- lesson plan — outline of teaching session
- levorphanol — a potent synthetic narcotic analgesic, C 21 H 29 NO 7 , as the tartrate, used in the treatment of moderate to severe pain.
- linesperson — (sports) A linesman or lineswoman.
- lipogenesis — (biochemistry) The biochemical production of fat, especially the conversion of carbohydrate into fat so that it may be stored as a long-term source of energy when food is scarce.
- lipoprotein — any of the class of proteins that contain a lipid combined with a simple protein.
- lithopedion — (medical) A calcium-encased foetus that occurs in ectopic abdominal pregnancies when the foetus dies and is not reabsorbed by the maternal body, whereby the maternal system encases the foreign body (foetus) in calcium to isolate it.
- lone parent — a parent who is not married and does not have a partner, who is bringing up a child or children
- long jumper — an athlete who does the long jump
- long primer — a 12-point type.
- long splice — a splice for forming a united rope narrow enough to pass through a block, made by unlaying the ends of two ropes for a considerable distance, overlapping the strands so as to make pairs of one strand from each rope, unlaying one of each pair, twisting the other strand into its place in the united rope, and tucking the yarns of the unlaid strand separately into place.
- love potion — a magical potion believed to arouse love or sexual passion toward a specified person, especially the person offering it.
- low-protein — Low-protein substances contain very little protein.
- luminophore — a molecule or group of molecules that emits light when illuminated.
- lumpenprole — a member of the lumpenproletariat.
- luteotropin — prolactin.
- lycanthrope — a person affected with lycanthropy.
- lychnoscope — lowside window.
- lymph nodes — any of the glandlike masses of tissue in the lymphatic vessels containing cells that become lymphocytes.
- lymphokines — Plural form of lymphokine.
- lymphopenia — a reduction in the number of lymphocytes in the blood.
- madreporian — Resembling, or pertaining to, the genus Madrepora.
- mailpersons — Plural form of mailperson.
- manila rope — rope made from Manila hemp.
- maple honey — maple syrup.
- marksperson — A marksman or markswoman.
- mecopterans — Plural form of mecopteran.
- megaphoning — Present participle of megaphone.
- megaphonist — Someone who uses a megaphone.
- megapolitan — of, relating to, or characteristic of a megalopolis.
- melanophore — a pigmented connective-tissue cell containing melanin in its cytoplasm, responsible for color changes in many fishes and reptiles.
- mellophones — Plural form of mellophone.