11-letter words containing a, n, d, o
- radiophonic — a radiotelephone.
- radiovision — television.
- radix point — a point, such as the decimal point in the decimal system, separating the integral part of a number from the fractional part
- radnorshire — a historic county in Powys, in E Wales.
- railroading — a permanent road laid with rails, commonly in one or more pairs of continuous lines forming a track or tracks, on which locomotives and cars are run for the transportation of passengers, freight, and mail.
- rain shadow — a region in the lee of mountains that receives less rainfall than the region windward of the mountains.
- raking bond — a brickwork bond in which concealed courses of diagonally laid bricks are used to bond exposed brickwork to the wall structure.
- rallentando — slackening; becoming slower (used as a musical direction).
- rally round — show solidarity
- random line — a trial survey line run from a station toward a predetermined point that cannot be seen from the station.
- random walk — Statistics. the path taken by a point or quantity that moves in steps, where the direction of each step is determined randomly.
- ration card — a card showing an individual's entitlement to certain rationed goods
- readjourned — to suspend the meeting of (a club, legislature, committee, etc.) to a future time, another place, or indefinitely: to adjourn the court.
- readmission — the act of allowing to enter; entrance granted by permission, by provision or existence of pecuniary means, or by the removal of obstacles: the admission of aliens into a country.
- ready money — money that is in hand or may be obtained quickly or easily; cash.
- reannounced — to make known publicly or officially; proclaim; give notice of: to announce a special sale.
- reappointed — to name or assign to a position, an office, or the like; designate: to appoint a new treasurer; to appoint a judge to the bench.
- rear window — the window at the back of a motor vehicle
- recordation — the act or process of recording: the recordation of documents pertaining to copyright ownership.
- redactional — to put into suitable literary form; revise; edit.
- reductional — of, characterized by, or relating to reduction
- reeducation — to educate again, as for new purposes.
- rehydration — to restore moisture or fluid to (something dehydrated).
- rejoneadora — a female bullfighter who rides horseback during a fight and spears the bull with lances
- remand home — a detention home for juvenile offenders aged 8–16 years.
- remediation — the correction of something bad or defective.
- reoxidation — the process or result of oxidizing.
- repudiation — the act of repudiating.
- reradiation — Physics. radiation emitted as a consequence of a previous absorption of radiation.
- restationed — a place or position in which a person or thing is normally located.
- retardation — the act of retarding or state of being retarded.
- retinal rod — any of the elongated cylindrical cells in the retina of the eye, containing the visual purple (rhodopsin), which are sensitive to dim light but not to colour
- rhabdomancy — divination by means of a rod or wand, especially in discovering ores, springs of water, etc.
- rhododaphne — a shrub with narrow, poisonous evergreen leaves and attractive pink flowers, also known as oleander or rosebay
- road racing — a competitive event of racing in automobiles, motorcycles, or bicycles over public roads or a twisting course simulating a public road, as opposed to a closed, banked track or a drag strip.
- road-runner — either of two large terrestrial cuckoos of the genus Geococcyx of arid regions of the western U.S., Mexico, and Central America, especially G. californianus (greater roadrunner)
- roadholding — A vehicle's roadholding is how easy it is to control safely in difficult driving conditions or when going round bends.
- robbinsdale — a city in SE Minnesota, near Minneapolis.
- rock garden — a garden on rocky ground or among rocks, for the growing of alpine or other plants.
- rock island — a port in NW Illinois, on the Mississippi: government arsenal.
- rock-garden — a garden on rocky ground or among rocks, for the growing of alpine or other plants.
- rod bearing — a bearing in the metal shaft that transmits power in axial reciprocating motion
- rodomontade — vainglorious boasting or bragging; pretentious, blustering talk.
- roll around — to move along a surface by revolving or turning over and over, as a ball or a wheel.
- roll-around — equipped with wheels or casters so as to be easily movable from one location to another: a roll-around kitchen counter.
- roman blind — a window blind consisting of a length of material which, when drawn up, gathers into horizontal folds from the bottom
- roman shade — a window shade that, when raised, is drawn up into a series of concertina folds.
- roof garden — a garden on the flat roof of a house or other building.
- root around — rummage
- rope dancer — a person who walks across or performs acrobatics upon a rope stretched at some height above the floor or ground.