13-letter words containing o, a, h, u
- hydrosulphate — a salt formed by the direct union of sulfuric acid with an organic base, especially an alkaloid, and usually more soluble than the base.
- hypercautious — Especially or unreasonably cautious.
- hypermutation — (uncountable) Frequent mutation.
- hyposexuality — A significantly low level of sexuality.
- hyracotherium — eohippus.
- hysteranthous — relating to a plant whose flowers open before its leaves
- ichthyofaunal — relating to ichthyofauna
- ichthyosaurus — ichthyosaur.
- immunotherapy — treatment designed to produce immunity to a disease or enhance the resistance of the immune system to an active disease process, as cancer.
- inner harbour — a part of a harbour which is further inland
- jequitinhonha — a river in E Brazil, flowing from the state of Minas Gerais to the Atlantic Ocean. 500 miles (805 km) long.
- jodhpuri coat — a coat worn by men in India, similar to but shorter than a sherwani
- john of gaunt — John of, John of Gaunt.
- johnny canuck — a personification of Canada
- judeo-spanish — Ladino (def 1).
- kilowatt-hour — a unit of energy, equivalent to the energy transferred or expended in one hour by one kilowatt of power; approximately 1.34 horsepower-hours. Abbreviation: kWh, K.W.H., kwhr.
- lace-up shoes — shoes which are fastened with laces
- lap of honour — If the winner of a race or game does a lap of honour, they run or drive slowly around a race track or sports field in order to receive the applause of the crowd.
- laughingstock — an object of ridicule; the butt of a joke or the like: His ineptness as a public official made him the laughingstock of the whole town.
- launch window — a precise time period during which a spacecraft can be launched from a particular site in order to achieve a desired mission, as a rendezvous with another spacecraft.
- leptocephalus — a colorless, transparent, flattened larva, especially of certain eels and ocean fishes.
- lighthouseman — a lighthouse keeper
- literacy hour — (in England and Wales) a daily reading and writing lesson that was introduced into the national primary school curriculum in 1998 to raise standards of literacy
- logical truth — the property of being logically tautologous
- low churchman — a person who advocates or follows Low Church practices.
- luncheon meat — any of various sausages or molded loaf meats, usually sliced and served cold, as in sandwiches or as garnishes for salads.
- lycanthropous — Lycanthropic.
- macrocephalus — Alternative spelling of macrocephalous.
- mana motuhake — independence or autonomy
- mango chutney — chutney which contains or is made from the fruit mango
- mansion house — the residence of the Lord Mayor of London
- mare chronium — an area in the southern hemisphere of Mars, appearing as a dark region when viewed telescopically from the earth.
- marrow squash — any of several squashes having a smooth surface, an oblong shape, and a hard rind.
- mealy-mouthed — avoiding the use of direct and plain language, as from timidity, excessive delicacy, or hypocrisy; inclined to mince words; insincere, devious, or compromising.
- megawatt hour — a unit of energy equal to the work done by a power of a million watts in one hour
- melancholious — (obsolete) melancholy.
- melanochroous — having dark-coloured or black skin
- mesocephalous — Alternative form of mesocephalic.
- microcephalus — An abnormally small head.
- mosquito hawk — nighthawk (def 1).
- mother nature — a personification of the forces of nature as a controlling and regulating maternal being, sometimes creative and caring.
- mount markham — a mountain in Antarctica, in Victoria Land. Height: 4350 m (14 272 ft)
- moustache cup — mustache cup.
- mouthbreather — a person who breathes through the mouth instead of through the nose
- mouthwatering — very appetizing in appearance, aroma, or description: a mouth-watering dessert.
- multihospital — comprising or relating to several hospitals
- muscle shoals — former rapids of the Tennessee River in SW Alabama, changed into a lake by Wilson Dam: part of the Tennessee Valley Authority.
- musicotherapy — the treatment of mental disorders with music
- musquash root — spotted cowbane.
- mycetophagous — That feeds on fungi.