13-letter words containing a, n, d, r, o
- grandmotherly — of or characteristic of a grandmother.
- granodioritic — relating to granodiorite
- ground attack — an attack using ground forces, as opposed to air or naval forces
- ground tackle — equipment, as anchors, chains, or windlasses, for mooring a vessel away from a pier or other fixed moorings.
- ground-to-air — (of weapons) designed to be fired at aircraft from the ground
- groundbreaker — a person who is an originator, innovator, or pioneer in a particular activity.
- groundhog day — February 2, in most parts of the U.S., the day on which, according to legend, the groundhog first emerges from hibernation. If it is a sunny day and the groundhog sees its shadow, six more weeks of wintry weather are predicted.
- gunpowder tea — an explosive mixture, as of potassium nitrate, sulfur, and charcoal, used in shells and cartridges, in fireworks, for blasting, etc.
- gynandromorph — an individual exhibiting morphological characteristics of both sexes.
- hammond organ — an electric organ with two keyboards, electronic tone generation, and a wide variety of tone colours: invented in 1934
- hampton roads — a channel in SE Virginia between the mouth of the James River and Chesapeake Bay: battle between the Monitor and the Virginia 1862.
- hand controls — a set of controls in some cars, operated by hand, that have the same function as the accelerator, brake, and clutch pedals
- harold burton — Harold Hitz [hits] /hɪts/ (Show IPA), 1888–1964, associate justice of the U.S. Supreme Court 1945–58.
- hartford fern — a climbing or sprawling fern, Lygodium palmatum, of the eastern U.S., having deeply lobed ivylike leaves.
- hazardousness — The condition of being hazardous.
- heading sword — a sword used for beheading.
- heaven forbid — You say 'Heaven forbid!' to emphasize that you very much hope that something will not happen.
- heli-boarding — the sport of snowboarding on mountains or glaciers accessible only by helicopter or skiplane
- henceforwards — (archaic) henceforth, from this point onwards.
- hendecahedron — a solid figure having 11 faces.
- hero sandwich — a large sandwich, usually consisting of a small loaf of bread or long roll cut in half lengthwise and containing a variety of ingredients, as meat, cheese, lettuce, and tomatoes.
- herod antipas — died after a.d. 39, ruler of Galilee, a.d. 4–39: ordered the execution of John the Baptist and participated in the trial of Jesus.
- heroin addict — sb dependent on heroin
- honey buzzard — a long-tailed Old World hawk, Pernis apivorus, that feeds on the larvae of bees as well as on small rodents, reptiles, and insects.
- horned lizard — an insectivorous iguanid lizard of the genus Phrynosoma, of western North America, having hornlike spines on the head and a flattened body covered with spiny scales.
- horse trading — the act or fact of conducting a shrewd exchange or engaging in a horse trade; bargaining.
- horse-trading — to bargain or trade shrewdly.
- house-trained — housebroken.
- hudson strait — a strait connecting Hudson Bay and the Atlantic. 450 miles (725 km) long; 100 miles (160 km) wide.
- hyaluronidase — Biochemistry. a mucolytic enzyme found in the testes, in snake venom, and in hemolytic streptococci and certain other bacteria, that decreases the viscosity of the intercellular matrix by breaking down hyaluronic acid.
- hybridisation — Alternative form of hybridization.
- hybridization — to cause to produce hybrids; cross.
- hydroairplane — a hydroplane.
- hydroboration — (chemistry) the production or organoboranes by the addition of diborane to unsaturated organic compounds.
- hydrocracking — the cracking of petroleum or the like in the presence of hydrogen.
- hydrodynamics — the branch of fluid dynamics that deals with liquids, including hydrostatics and hydrokinetics.
- hydrofracking — a process in which fractures in rocks below the earth's surface are opened and widened by injecting chemicals and liquids at high pressure: used especially to extract natural gas or oil.
- hydrogenating — Present participle of hydrogenate.
- hydrogenation — to combine or treat with hydrogen, especially to add hydrogen to the molecule of (an unsaturated organic compound).
- hydroxylamine — an unstable, weakly basic, crystalline compound, NH 3 O, used as a reducing agent, analytical reagent, and chemical intermediate.
- hydroxylation — (organic chemistry) The introduction of a hydroxyl group into a molecule, especially by the replacement of a hydrogen atom.
- hyperadenosis — abnormal enlargement of the glands, especially of the lymph nodes.
- hypo-chondria — Also, hypochondriasis [hahy-poh-kuh n-drahy-uh-sis] /ˌhaɪ poʊ kənˈdraɪ ə sɪs/ (Show IPA). Psychiatry. an excessive preoccupation with one's health, usually focusing on some particular symptom, as cardiac or gastric problems.
- hypochondriac — Also, hypochondriacal, H05/H0509000 hahy-poh-kuh n-drahy-uh-kuh l, ˌhaɪ poʊ kənˈdraɪ ə kəl. Psychiatry. pertaining to or suffering from hypochondria, an excessive preoccupation with and worry about one's health: The comedy is aimed at the hypochondriac demographic. produced by hypochondria: Hypochondriac feelings overwhelmed her.
- hypohydration — Dehydration.
- idiosyncratic — pertaining to the nature of idiosyncrasy, or something peculiar to an individual: The best minds are idiosyncratic and unpredictable as they follow the course of scientific discovery.
- imponderables — Plural form of imponderable.
- in moderation — not to excess
- in order that — used to introduce a clause of purpose
- inboard motor — a boat's motor that is situated within the hull