11-letter words containing o, p, e, r, a, s
- horn-spread — (of a horned creature) the distance between the outermost tips of the horns.
- horse opera — a television or radio program or motion picture about the Wild West, often presented serially and usually dealing with adventures of cowboys, gunmen, gold prospectors, etc. Compare Western (def 8).
- horseplayer — a habitual bettor on horse races.
- hospitaller — a member of the religious and military order (Knights Hospitalers or Knights of St. John of Jerusalem) originating about the time of the first Crusade (1096–99) and taking its name from a hospital at Jerusalem.
- house party — the guests at such an affair or party: The house party goes sailing today.
- houseparent — one of a married couple responsible for a group of young people, as students, living in a dormitory, hostel, etc., sometimes acting solely as an advisor, but often serving as host or hostess, chaperon, housekeeper, etc.
- hydroplanes — Plural form of hydroplane.
- hypersomnia — a tendency to sleep excessively.
- ideopraxist — a person who is impelled to carry out an idea
- impersonate — to assume the character or appearance of; pretend to be: He was arrested for impersonating a police officer.
- importances — the quality or state of being important; consequence; significance.
- impresarios — Plural form of impresario.
- improvisate — To improvise; to extemporize.
- in personam — (of a judicial act) directed against a specific person or persons
- invert soap — cationic detergent.
- isodiaphere — one of two or more nuclides in which the difference between the number of neutrons and the number of protons is the same
- isometropia — equality of refraction in the two eyes of an individual.
- isospectral — (mathematics) Having the same spectrum.
- iteroparous — (of a plant) producing flowers and fruit more than once (usually many times) before dying
- jeopardised — Simple past tense and past participle of jeopardise.
- jeopardizes — Third-person singular simple present indicative form of jeopardize.
- joseph raff — Joseph Joachim, 1822–82, Swiss composer.
- keratoscope — an instrument, as Placido's disk, for determining the symmetry of the curvature of the cornea.
- keratoscopy — an instrument, as Placido's disk, for determining the symmetry of the curvature of the cornea.
- kiloparsecs — Plural form of kiloparsec.
- kleptocrats — Plural form of kleptocrat.
- laparoscope — a flexible fiberoptic instrument, passed through a small incision in the abdominal wall and equipped with biopsy forceps, an obturator, scissors or the like, with which to examine the abdominal cavity or perform minor surgery.
- laser proof — a print proof of an element of a page printed out on a laser printer, so as to give an almost accurate preview of the final printout
- leafhoppers — Plural form of leafhopper.
- leopardskin — the skin of a leopard
- lepromatous — the swollen lesion of leprosy.
- leprosarium — a hospital for the treatment of lepers.
- leptospiral — relating to, caused by, or characteristic of leptospires
- loudspeaker — any of various devices, usually electronic, by which speech, music, etc., can be intensified and made audible throughout a room, hall, or the like.
- lower apsis — See under apsis (def 1).
- macrophages — Plural form of macrophage.
- macrophytes — Plural form of macrophyte.
- macrospores — Plural form of macrospore.
- mailpersons — Plural form of mailperson.
- marksperson — A marksman or markswoman.
- master copy — an original copy, stencil, tape, etc, from which duplicates are made
- mecopterans — Plural form of mecopteran.
- memory span — the capacity of short-term memory, usually between 5 and 10 items
- mesotherapy — a cosmetic procedure in which minute doses of medication, vitamins, etc, are injected repeatedly into the mesodermal tissue under the skin to promote fat loss
- metanephros — one of the three embryonic excretory organs of higher vertebrates, becoming the permanent and functional kidney.
- metaphorist — a creator or user of metaphors
- microphages — Plural form of microphage.
- mimeographs — Plural form of mimeograph.
- misanthrope — a comedy (1666) by Molière.
- morse taper — a taper that is one of a standard series used in the shank of tools to fit a matching taper in the mandrel of a machine tool