13-letter words containing o, s, m, u
- harbourmaster — (British, Canada, nautical) An official responsible for the enforcement of regulations in a port.
- harvest mouse — an Old World field mouse, Micromys minutus, that builds a spherical nest among the stems of grains and other plants.
- he's your man — he's the person needed (for a particular task, role, job, etc)
- hematophagous — feeding on blood, as the vampire bat.
- hemicellulose — any of a group of gummy polysaccharides, intermediate in complexity between sugar and cellulose, that hydrolyze to monosaccharides more readily than cellulose.
- home counties — The Home Counties are the counties which surround London.
- homeomorphous — similarity in crystalline form but not necessarily in chemical composition.
- homeothermous — remaining at an almost constant temperature
- homogeneously — composed of parts or elements that are all of the same kind; not heterogeneous: a homogeneous population.
- homosexualism — A sexual attraction to (or sexual relations with) individuals of the same sex.
- homosexuality — sexual desire or behavior directed toward a person or persons of one's own sex.
- horse's mouth — horse (def 36).
- host computer — the main computer in a network: controls or performs certain functions for other computers.
- hothouse lamb — a lamb born in the fall or early winter, usually reared indoors, specially fed, and marketed when from 9 to 16 weeks of age.
- house manager — a business manager responsible for managing a theater and its staff.
- house-warming — a party to celebrate a person's or family's move to a new home.
- housemistress — A female teacher in charge of a dormitory at a boarding school.
- housewarmings — Plural form of housewarming.
- humorlessness — The state, quality, or condition of lacking humor.
- hunter's moon — the first full moon following the harvest moon in late September or early October.
- hydromedusoid — a jellyfish or something resembling a jellyfish that lives in water
- hymenopterous — belonging or pertaining to the Hymenoptera, an order of insects having, when winged, four membranous wings, and comprising the wasps, bees, ants, ichneumon flies, and sawflies.
- if you ask me — You can say 'if you ask me' to emphasize that you are stating your personal opinion.
- ignominiously — marked by or attended with ignominy; discreditable; humiliating: an ignominious retreat.
- illuminations — Plural form of illumination.
- illustrissimo — most illustrious (esp as belonging to the Italian aristocracy)
- immunisations — Plural form of immunisation.
- immunizations — Plural form of immunization.
- immunochemist — A chemist whose speciality is immunochemistry.
- immunogenesis — the production of an immune response
- immunosorbent — an insoluble surface to which a specific antibody is attached for the purpose of removing the corresponding antigen from a solution or suspension.
- impecuniosity — having little or no money; penniless; poor.
- impecuniously — In an impecunious manner.
- imperiousness — domineering in a haughty manner; dictatorial; overbearing: an imperious manner; an imperious person.
- impetuosities — Plural form of impetuosity.
- impetuousness — of, relating to, or characterized by sudden or rash action, emotion, etc.; impulsive: an impetuous decision; an impetuous person.
- importunities — Plural form of importunity.
- impostumation — an abscess or swelling filled with pus
- inclusion map — a map of a set to itself in which each element of a given subset of the set is mapped to itself.
- incombustible — not combustible; incapable of being burned; fireproof.
- income source — something that provides a regular supply of money, such as employment, investments, a pension etc
- inhomogeneous — lack of homogeneity.
- isoamyl group — the univalent group C 5 H 11 .
- james douglas — Sir James ("the Black Douglas") 1286–1330, Scottish military leader.
- jejunostomies — Plural form of jejunostomy.
- jerusalem oak — feather geranium.
- jumping mouse — any of several primitive, mouselike rodents of the family Zapodidae, having long hind legs, common in the woodlands of Europe, Asia, and North America.
- jus canonicum — canon law.
- just a moment — an expression requesting the hearer to wait or pause for a brief period of time
- kim young sam — born 1927, president of South Korea 1993–98.