9-letter words containing a, e, r, o
- apronlike — resembling an apron
- aprosexia — Inability to concentrate.
- aquadrome — a venue for water sports
- arabinose — a pentose sugar in plant gums, esp of cedars and pines. It is used as a culture medium in bacteriology. Formula: C5H10O5
- aragonese — a native or inhabitant of Aragon
- aragonite — a generally white or grey mineral, found in sedimentary rocks and as deposits from hot springs. Composition: calcium carbonate. Formula: CaCO3. Crystal structure: orthorhombic
- arboreous — thickly wooded; having many trees
- arboretum — An arboretum is a specially designed garden of different types of trees.
- arborized — Simple past tense and past participle of arborize.
- arccosine — the function the value of which for a given argument between –1 and 1 is the angle in radians (between 0 and π), the cosine of which is that argument: the inverse of the cosine function
- archaeol. — archaeology
- archilowe — a treat, such as a drink, given in return for something
- archstone — a wedge-shaped stone forming the curved part of an arch
- arcsecond — unit used in astronomy
- arctogaea — a zoogeographical area comprising the Palaearctic, Nearctic, Oriental, and Ethiopian regions
- area code — The area code for a particular city or region is the series of numbers that you have to dial before someone's personal number if you are making a telephone call to that place from a different area.
- arecoline — a drug derived from betel nuts and producing a range of effects, including increased salivation, body temperature, and heart rate
- arenation — the use of hot sand as a medical poultice
- areolated — marked by areolae
- areopagus — the hill to the northwest of the Acropolis in Athens
- areostyle — (of columned buildings) having a wide intercolumniation equal to four or more diameters of one of the columns
- argentous — of or containing silver in the monovalent state
- argue out — If two or more people argue something out, they discuss it or thoroughly in order to reach a conclusion or decision.
- arid zone — either of the zones of latitude 15–30° N and S characterized by very low rainfall and desert or semidesert terrain
- aristotle — a bottle
- armorless — any covering worn as a defense against weapons.
- armourers — Plural form of armourer.
- armouries — a drill hall used for training and as headquarters by a reserve unit of the armed forces
- aromatase — an enzyme that converts testosterone into an oestrogen
- aromatise — Alternative spelling of aromatize.
- aromatize — to make aromatic
- arousable — able to be aroused
- arpeggios — Plural form of arpeggio.
- arrestors — Plural form of arrestor.
- arrogance — the quality or state of being arrogant; overbearing pride or self-importance
- arrogated — Simple past tense and past participle of arrogate.
- arrogates — Third-person singular simple present indicative form of arrogate.
- arrow key — (hardware) One of four keys on a keyboard marked with arrows pointing up, down, left and right. The arrow keys are used for such things as moving the cursor in a text document, for moving the input focus between the fields of a form or sometimes for scrolling a picture.
- arrowhead — An arrowhead is the sharp, pointed part of an arrow.
- arrowless — having no arrows
- arrowlike — resembling an arrow
- arseholed — very drunk
- arsenious — of or containing arsenic in the trivalent state
- art house — a motion-picture theater specializing in the exhibition of art films.
- art-house — An art-house film is a film that is intended to be a serious artistic work rather than a piece of popular entertainment.
- artemotil — A fast-acting blood schizonticide specifically indicated for the treatment of chloroquine-resistant Plasmodium falciparum malaria and cerebral malaria cases.
- artemovsk — a city in E Ukraine.
- arteriola — (anatomy) An arteriole.
- arteriole — any of the small subdivisions of an artery that form thin-walled vessels ending in capillaries
- arternoon — Eye dialect of afternoon.