12-letter words containing a, g, i, o, r
- apportioning — Present participle of apportion.
- apron string — a string for tying an apron on
- archaeologic — Pertaining to archaeology.
- archegoniate — having archegonia
- archeologist — archaeology.
- archipelagos — Plural form of archipelago.
- area bombing — aerial bombing in which bombs are dropped over the general area of a target.
- argillaceous — (of sedimentary rocks and deposits) composed of very fine-grained material, such as clay, shale, etc
- arpeggiation — the writing, playing or singing of arpeggios
- arsino group — the univalent group H 2 As−.
- arteriograms — Plural form of arteriogram.
- astigmometer — an apparatus for measuring the degree of astigmatism.
- astrobiology — the branch of biology that investigates the possibility of life elsewhere in the universe
- astrological — the study that assumes and attempts to interpret the influence of the heavenly bodies on human affairs.
- astroturfing — a PR tactic used in politics and advertising in which actors are paid to display overt and apparently spontaneous grassroots support for a particular product, policy, or event
- autographing — Present participle of autograph.
- backcrossing — (genetics) The crossing of a hybrid with one of its parents or an individual genetically similar to its parent.
- bacteriology — Bacteriology is the science and the study of bacteria.
- barking frog — a robber frog, Hylactophryne augusti, of Texas, New Mexico, and Mexico, having a call like a dog's bark.
- barnstorming — A barnstorming performance is full of energy and very exciting to watch.
- bearing down — to hold up; support: to bear the weight of the roof.
- bibliography — A bibliography is a list of books on a particular subject.
- bingo caller — the person who shouts out the numbers to bingo players
- bio-organism — a dangerous fast-proliferating organism that could be used as the basis of a biological weapon
- biogeography — the branch of biology concerned with the geographical distribution of plants and animals
- biographical — Biographical facts, notes, or details are concerned with the events in someone's life.
- bioinorganic — pertaining to the biological activity of metal complexes and nonmetal compounds based on elements other than carbon (contrasted with bioorganic).
- boar-hunting — the practice of hunting wild boars
- boarding out — the local-authority practice of placing a client in a foster family or voluntary establishment and paying for it
- boardsailing — windsurfing
- boating trip — a trip or holiday in a boat such as a sailing boat or canal boat
- bodyboarding — the sport of surfing using a bodyboard
- boilermaking — metal-working in heavy industry; plating or welding
- boogie board — a small, flexible plastic surfboard, ridden lying down.
- boolean ring — a nonempty collection of sets having the properties that the union of two sets of the collection is a set in the collection and that the relative complement of each set with respect to any other set is in the collection.
- boomeranging — a bent or curved piece of tough wood used by the Australian Aborigines as a throwing club, one form of which can be thrown so as to return to the thrower.
- born-digital — relating to or noting documents, images, etc., that are created and managed in electronic form: electronic preservation of born-digital content; a born-digital e-book that will not be available in print.
- boulangerite — a bluish lead-gray mineral, lead antimony sulfide, Pb 5 Sb 4 S 11 , a minor ore of lead.
- braggadocios — empty boasting; bragging.
- bring action — to start a lawsuit
- bring around — If you bring someone around when they are unconscious, you make them become conscious again.
- bring to bay — to force into a position from which retreat is impossible
- broadcasting — Broadcasting is the making and sending out of television and radio programmes.
- brown bag it — to bring (one's own liquor) to a restaurant or club, especially one that has no liquor license.
- bur marigold — any plant of the genus Bidens that has yellow flowers and pointed fruits that cling to fur and clothing: family Asteraceae (composites)
- cabriole leg — a type of furniture leg, popular in the first half of the 18th century, in which an upper convex curve descends tapering to a concave curve
- camphorating — Present participle of camphorate.
- canyoneering — (US) Canyoning, a hybrid outdoor sport involving the traversal of river canyons.
- caparisoning — Present participle of caparison.
- carbonadoing — Present participle of carbonado.