13-letter words containing o, b, d, u, r, a
- fume cupboard — vent used in a laboratory
- groundbreaker — a person who is an originator, innovator, or pioneer in a particular activity.
- harold burton — Harold Hitz [hits] /hɪts/ (Show IPA), 1888–1964, associate justice of the U.S. Supreme Court 1945–58.
- 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.
- insubordinate — not submitting to authority; disobedient: an insubordinate soldier.
- labrador duck — an extinct sea duck, Camptorhynchus labradorius, of northern North America, having black and white plumage.
- mandibuliform — Having the form of a mandible; - said especially of the maxill\u00e6 of an insect when hard and adapted for biting.
- mountainboard — a type of skateboard specially designed for rough terrain and steep slopes, having four large wheels linked by a suspension system
- mourning band — a piece of black material, esp an armband, worn to indicate that the wearer is in mourning
- neurofeedback — The presentation of realtime feedback on brainwave activity, as measured by sensors on the scalp, sometimes offered as a means of therapy.
- non-budgetary — an estimate, often itemized, of expected income and expense for a given period in the future.
- nonrefundable — an amount refunded.
- old bulgarian — the Bulgarian language of the Middle Ages.
- onus probandi — the burden of proof.
- organ-builder — a maker of organs
- outward bound — (in Britain) a scheme to provide adventure training for young people
- outward-bound — headed in an outward direction, as toward foreign ports: We passed an outward-bound ship as we came into the harbor.
- over-abundant — an excessive amount or abundance; surfeit: an overabundance of sugar in the diet.
- overabundance — an excessive amount or abundance; surfeit: an overabundance of sugar in the diet.
- quarter-bound — a style of bookbinding in which the spine is leather and the sides are cloth or paper.
- random number — pseudorandom number
- random rubble — masonry in which untooled stones are set without coursing
- redial button — a button on a telephone, allowing the user to dial a number again
- running board — a small ledge, step, or footboard, formerly beneath the doors of an automobile, to assist passengers entering or leaving the car.
- sodium borate — borax1 .
- sound barrier — Also called sonic barrier, transonic barrier. (not in technical use) a hypothetical barrier to flight beyond the speed of sound, so postulated because aircraft undergo an abruptly increasing drag force induced by compression of the surrounding air when traveling near the speed of sound.
- sound blaster — (hardware) The best known family of sound cards for the IBM PC from Creative Labs.
- sound library — a collection of sounds stored on file (for example on CDs, DVDs, or as digital audio files)
- subordination — the act of placing in a lower rank or position: The refusal to allow women to be educated was part of society's subordination of women to men.
- subordinative — placed in or belonging to a lower order or rank.
- transboundary — something that indicates bounds or limits; a limiting or bounding line.
- treasury bond — any of various interest-bearing bonds issued by the U.S. Treasury Department, usually maturing over a long period of time.
- turbo-charged — A turbo-charged engine or vehicle is fitted with a turbo.
- unobliterated — to blot out or render undecipherable (writing, marks, etc.); efface.
- wall cupboard — a cupboard that is fixed to a wall
- weather-bound — delayed or shut in by bad weather.