12-letter words containing r, h, o
- drama school — a college which trains students (who are generally 18+) to act
- drapery shop — a shop selling fabrics and sewing materials
- draughtboard — checkerboard (def 1).
- draughtproof — That prevents the access of draughts.
- dreadnoughts — Plural form of dreadnought.
- drift anchor — a sea anchor or drag.
- drinker moth — a large yellowish-brown bombycid eggar moth, Philudoria potatoria, having a stout hairy body, the larvae of which drink dew and feed on grasses
- drop shipper — a wholesaler or distributor who conducts business in drop shipments.
- droughtiness — Dryness of the weather; lack of rain.
- drove chisel — a chisel with a broad edge used for dressing stone
- drug holiday — a brief period during which a patient stops taking a prescribed medication, especially an antidepressant, to recover some normal functions, reduce side effects, or maintain sensitivity to the drug.
- dryopithecus — an extinct genus of generalized hominoids that lived in Europe and Africa during the Miocene Epoch and whose members are characterized by small molars and incisors.
- dutch borneo — the former name of the southern and larger part of the island of Borneo: now part of Indonesia.
- dutch clover — white clover.
- dutch harbor — a U.S. naval base on Unalaska Island, in the Aleutian Islands.
- dysmenorrhea — painful menstruation.
- e-thrombosis — a clot in the bloodstream caused by long periods spent being physically inactive at a computer
- earth almond — chufa.
- earth closet — a type of lavatory in which earth is used to cover excreta
- earth colour — any of various brown pigments composed chiefly of iron oxides
- earth mother — the earth conceived of as the female principle of fertility and the source of all life.
- earth tongue — any of a group of fungi of the phylum Ascomycota, characterized by a tongue-shaped fruiting body, found on decaying logs and damp soil.
- earth tremor — a relatively small or short-lived movement of the earth's surface caused by the same forces that produce earthquakes
- earth-mother — the earth conceived of as the female principle of fertility and the source of all life.
- earth-moving — Earth-moving equipment is machinery that is used for digging and moving large amounts of soil.
- echinodermal — (zoology) Relating or belonging to the echinoderms.
- echo chamber — a room or studio with resonant walls for broadcasting or recording echoes or hollow sound effects.
- echo sounder — a sonar instrument that uses echolocation to measure depths under water.
- echolocators — Plural form of echolocator.
- ectypography — a form of etching or engraving in which the design is produced in relief
- edaphosaurus — Any of several dinosaurs of the family Edaphosauridae, from the Carboniferous and Permian periods, that had a distinctive dorsal sail or crest.
- ehrlichiosis — (medicine) A tick-borne disease caused by infection with bacteria of the genus Ehrlichia.
- elasmobranch — A cartilaginous fish of a group that comprises the sharks, rays, and skates.
- electroclash — a type of electronic music, originating in the first decade of the 21st century, that combines modern techno with synthesizer music characteristic of the 1980s
- electrograph — A machine used in gravure printing.
- electrophile — (chemistry) a compound or functional group that is attractive to, and accepts electrons, especially accepting an electron pair from a nucleophile to form a bond.
- electrophone — (music) any instrument designed to create sounds using electrical currents.
- electrophori — Plural form of electrophorus.
- electroshock — Of or relating to medical treatment by means of electric shocks.
- elkhorn fern — a tropical fern with a large leaf like an elk's horn
- ellenborough — Earl of, title of Edward Law. 1780–1871, British colonial administrator: governor general of India (1742–44)
- ellipsograph — an instrument that draws ellipses
- emerald moth — any of various green geometrid moths, esp the large emerald (Geometra papilionaria) a handsome pale green moth with white wavy markings
- en brochette — (esp of meat) roasted or grilled on a skewer
- enantiomorph — Each of two crystalline or other geometric forms that are mirror images of each other.
- enarthrodial — Relating to an enarthrosis.
- enchiridions — Plural form of enchiridion.
- encroachment — Intrusion on a person's territory, rights, etc.
- endochondral — occurring, or present, in cartilage
- endomorphism — changes in a cooling body of igneous rock brought about by assimilation of fragments of, or chemical reaction with, the surrounding country rock