12-letter words containing e, r, g, o, a
- 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
- arseno group — the bivalent group −As=As−.
- arteriograms — Plural form of arteriogram.
- assay groove — (in silverwork) a furrow left in a piece by the digging out of metal for assay.
- astigmometer — an apparatus for measuring the degree of astigmatism.
- astrogeology — the study of the structure, composition, and history of other planets and other bodies in the solar system
- attenborough — Sir David. born 1926, British naturalist and broadcaster; noted esp for his TV series Life on Earth (1978), The Living Planet (1983), The Life of Birds (1998), The Life of Mammals (2002), and First Life (2010)
- auger shower — a shower of electrons, photons, etc. resulting from the collision of primary cosmic rays with atomic nuclei in the atmosphere
- autochangers — Plural form of autochanger.
- backgrounded — Simple past tense and past participle of background.
- backgrounder — A backgrounder is a short article in a newspaper or magazine that provides background information about a particular subject.
- bacteriology — Bacteriology is the science and the study of bacteria.
- balladmonger — (formerly) a seller of ballads, esp on broadsheets
- barcalounger — a type of reclinable armchair with an extendable footrest
- barge couple — either of a pair of outside rafters along the gable end of a roof
- barge course — the overhang of the gable end of a roof
- barrel organ — A barrel organ is a large machine that plays music when you turn the handle on the side. Barrel organs used to be played in the street to entertain people.
- baton charge — A baton charge is an attacking forward movement made by a large group of policemen carrying batons.
- battle group — a group of warships usually consisting of at least one aircraft carrier, other surface ships, submarines, landing craft, etc
- battleground — A battleground is the same as a battlefield.
- beardtongues — Plural form of beardtongue.
- bearing down — to hold up; support: to bear the weight of the roof.
- benzal group — the bivalent group C 7 H 6 –, derived from benzaldehyde.
- bingo caller — the person who shouts out the numbers to bingo players
- biogeography — the branch of biology concerned with the geographical distribution of plants and animals
- black grouse — a large N European grouse, Lyrurus tetrix, the male of which has a bluish-black plumage and lyre-shaped tail
- blaze orange — a very bright orange, as on a traffic cone.
- blood orange — a variety of orange all or part of the pulp of which is dark red when ripe
- bog rosemary — any of several species (genus Andromeda) of evergreen shrubs of the heath family, native to cold bogs of North America and Europe, with pink flowers and narrow leaves
- 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.
- border guard — a guard stationed on a border between countries
- boulangerite — a bluish lead-gray mineral, lead antimony sulfide, Pb 5 Sb 4 S 11 , a minor ore of lead.
- bound charge — any electric charge that is bound to an atom or molecule (opposed to free charge).
- boxgrove man — a type of primitive man, probably Homo heidelbergensis, and probably dating from the Middle Palaeolithic period some 500 000 years ago; remains were found at Boxgrove in West Sussex in 1993 and 1995
- break ground — to do something that has not been done before
- breakthrough — A breakthrough is an important development or achievement.
- breastplough — a plough driven by the worker's breast, often used to pare turf
- breath group — a sequence of sounds articulated in the course of a single exhalation; an utterance or part of an utterance produced between pauses for breath.
- brooks range — a mountain range in N Alaska. Highest peak: Mount Isto, 2761 m (9058 ft)
- brown bagger — to bring (one's own liquor) to a restaurant or club, especially one that has no liquor license.
- bugger about — If someone buggers about or buggers around, they waste time doing unnecessary things.
- burnt orange — of a dark orange colour, sometimes due to calcination of orange pigment
- cabbage rose — a rose, Rosa centifolia, with a round compact full-petalled head