9-letter words containing r, a, b, o
- alburnous — relating to alburnum
- albuterol — a bronchodilator used by sufferers of asthma, emphysema, and other lung conditions, to treat symptoms such as wheezing or shortness of breath
- alembroth — a double salt composed of the chlorides of ammonium and mercury, formerly believed to be a universal solvent
- algarroba — the edible pod of these trees
- algarrobo — a carob tree native to the Mediterranean region
- allobaric — of or relating to change in atmospheric pressure: allobaric wind.
- altar boy — In the Roman Catholic church, an altar boy is a boy who helps the priest during Mass.
- ambipolar — (of plasmas and semiconductors) involving both positive and negative charge carriers
- ambrosiac — Having the qualities of ambrosia; delicious.
- ambrosial — of or fit for the gods; divine
- ambrosian — exceptionally pleasing to taste or smell; especially delicious or fragrant.
- ambrotype — an early type of glass negative that could be made to appear as a positive by backing it with black varnish or paper
- ambulator — a person who walks
- amebiform — That resembles an amoeba / ameba.
- aminocarb — a crystalline compound, C 11 H 16 N 2 O 2 , used as a nonsystemic insecticide on various food crops and forest growth.
- anaerobes — Plural form of anaerobe.
- anaerobic — Anaerobic creatures or processes do not need oxygen in order to function or survive.
- ann arbor — a city in SE Michigan: seat of the University of Michigan. Pop: 114 498 (2003 est)
- antilabor — opposed to labor unions or to the interests of workers
- approbate — to accept as valid
- aquaboard — a board that can be used to ride on water
- aquarobic — pertaining to exercises performed standing up in a swimming pool
- arabinose — a pentose sugar in plant gums, esp of cedars and pines. It is used as a culture medium in bacteriology. Formula: C5H10O5
- arbor day — a tree-planting day observed individually by the states of the U.S., usually in spring
- arboreous — thickly wooded; having many trees
- arboretum — An arboretum is a specially designed garden of different types of trees.
- arborists — Plural form of arborist.
- arborized — Simple past tense and past participle of arborize.
- arboviral — caused by an arbovirus
- arbovirus — any one of a group of viruses that cause such diseases as encephalitis and dengue and are transmitted to humans by arthropods, esp insects and ticks
- arbuthnot — John. 1667–1735, Scottish physician and satirist: author of The History of John Bull (1712) and, with others, of the Memoirs of Martinus Scriblerus (1741)
- archabbot — In certain Catholic (notably Benedictine) congregations, the title of the general superior, ranking above all other abbots, vested in a particular abbey, which hence is called an archabbey (usually its motherhouse, such as Beuron, which gave its name to a Benedictine congregation).
- arousable — able to be aroused
- artmobile — a truck trailer outfitted to transport and exhibit works of art in areas without access to museums.
- aryballos — a small narrow-necked vessel or bottle shaped like a sphere, used in ancient Greece to store oil or perfume
- ascorbate — a salt of ascorbic acid
- ashburton — 1st Baron, Baring, Alexander.
- astrolabe — an instrument used by early astronomers to measure the altitude of stars and planets and also as a navigational aid. It consists of a graduated circular disc with a movable sighting device
- attleboro — a city in SE Massachusetts.
- aurobindo — Sri (Sri Aurobindo Ghose) 1872–1950, Indian scholar and spiritual leader.
- avicebron — (Solomon ben Judah ibn-Gabirol) 1021?–58, Jewish poet and philosopher in Spain.
- ayckbourn — Sir Alan. born 1939, English dramatist. His plays include Absurd Person Singular (1973), the trilogy The Norman Conquests (1974), A Chorus of Disapproval (1985), House and Garden (2000), and Private Fears in Public Places (2004)
- baal kore — an official in the synagogue, as a cantor, who reads the weekly portion of the Torah.
- baboonery — uncouth or brutish behaviour
- babyproof — made safe for babies to come into contact with
- bacciform — shaped like a berry
- bachelors — Plural form of bachelor.
- bachelour — Obsolete form of bachelor.
- back door — a door at the rear or side of a building
- back four — the defensive players in many modern team formations: usually two fullbacks and two centre backs