10-letter words containing o, r, a, e
- arc second — Astronomy. second2 (def 4).
- archdeacon — An archdeacon is a high-ranking clergyman who works as an assistant to a bishop, especially in the Anglican church.
- archegonia — the female reproductive organ in ferns, mosses, etc.
- archemorus — Opheltes.
- archeocyte — (in sponges) a type of amoebocyte capable of developing into other types of cells, especially reproductive cells.
- archeology — archaeology
- archeozoic — early Precambrian; Archean
- archespore — the cell or group of cells in a sporangium that gives rise to spores
- archipenko — Aleksandr Porfiryevich (alɪkˈsandr parˈfirjɪvitʃ). 1887– 1964, Russian sculptor and painter, in the US after 1923, whose work is characterized by economy of form
- archontate — an archon's period in office
- arctogaean — of or relating to Arctogaea
- arctophile — a person who collects teddy bears or is fond of them
- area opaca — the opaque area of the blastoderm surrounding the area pellucida.
- arefaction — the act of drying, or a dried condition
- areligious — unconcerned with or indifferent to religious matters.
- arenaceous — (of sedimentary rocks and deposits) composed of sand or sandstone
- areography — the description of the physical features, such as the surface, atmosphere, etc, of the planet Mars
- areopagite — a member of the Areopagus, a judicial council of ancient Athens that met on the hill of that name
- argenteous — silvery.
- argyrodite — a rare mineral, Ag8GeS6, that contains silver, germanium, and sulphur
- aristotype — a process of photographic printing in which paper coated with silver chloride in gelatin is used.
- armageddon — Armageddon is a terrible battle or war that some people think will lead to the total destruction of the world or the human race.
- armigerous — of, having, or entitled to have a coat of arms
- armipotent — strong in arms or war
- armourless — having no armour
- aromatized — Simple past tense and past participle of aromatize.
- arpeggione — a stringed musical instrument of the early 19th century which was played with a bow
- arrenotoky — parthenogenesis in which only males are produced.
- arrogative — Making undue claims and pretensions; prone to arrogance.
- arrowheads — Plural form of arrowhead.
- arse about — to play the fool; act stupidly, esp in an irritating manner
- arsenolite — a mineral, arsenic trioxide, As 2 O 3 , occurring usually as a white incrustation on arsenical ores.
- arteriolar — relating to arterioles or minuscule arteries
- arterioles — Plural form of arteriole.
- arthrodire — any of numerous fishes of the extinct order Arthrodira, widely distributed during the Devonian Period, having the anterior part of the body covered by a shield of bony plates.
- arthromere — any of the segments of the body of an arthropod
- arthrotome — (surgery) A strong scalpel used in the dissection of joints.
- artichokes — Plural form of artichoke.
- arvicoline — inhabiting meadows or rural areas
- arytenoids — Plural form of arytenoid.
- asbjornsen — Peter Christen [pey-tuh r kris-tuh n] /ˈpeɪ tər ˈkrɪs tən/ (Show IPA), 1812–85, Norwegian naturalist and folklorist.
- ascaridole — a liquid, C 10 H 16 O 2 , constituting the active principle of chenopodium oil, used chiefly as a catalyst in polymerization reactions.
- ascigerous — of or relating to asci.
- ascorbates — Plural form of ascorbate.
- ascospores — Plural form of ascospore.
- asgeirsson — Asgeir [ahs-gair] /ˈɑs gɛər/ (Show IPA), 1894–1972, Icelandic statesman: president 1952–68.
- aside from — Aside from means the same as apart from. This form is more usual in American English.
- asperation — The act of asperating; a making or becoming rough.
- aspersions — disparaging or malicious remarks; slanderous accusations
- aspersoria — Plural form of aspersorium.