12-letter words containing r, e, s, i
- antineutrons — Plural form of antineutron.
- antipleasure — opposed to pleasure
- antipyretics — Plural form of antipyretic.
- antistrophes — Plural form of antistrophe.
- antisymmetry — the correspondence in size, form, and arrangement of parts on opposite sides of a plane, line, or point; regularity of form or arrangement in terms of like, reciprocal, or corresponding parts.
- anton sailer — Anton [ahn-tohn] /ˈɑn toʊn/ (Show IPA), ("Toni") 1935–2009, Austrian skier.
- apostle bird — a gregarious grey-and-brown Australian nest-building bird, Struthidea cinerea
- apostrophise — to address by apostrophe.
- apostrophize — to address an apostrophe to
- apothecaries — Plural form of apothecary.
- applied arts — arts that are put to practical use
- appraisement — the act of estimating or judging the nature or value of something or someone.
- appreciators — to be grateful or thankful for: They appreciated his thoughtfulness.
- apprehension — Apprehension is a feeling of fear that something bad may happen.
- apprehensive — Someone who is apprehensive is afraid that something bad may happen.
- apprentisage — Obsolete form of apprenticeage.
- appressorium — a flattened hypha of a parasitic fungus that penetrates the host tissues
- appropriates — suitable or fitting for a particular purpose, person, occasion, etc.: an appropriate example; an appropriate dress.
- approximates — near or approaching a certain state, condition, goal, or standard.
- arbitrageurs — Plural form of arbitrageur.
- archdiocesan — Relating to an archdiocese.
- archdioceses — Plural form of archdiocese.
- archeologist — archaeology.
- archerfishes — Plural form of archerfish.
- archesporial — the primitive cell, or group of cells, that give rise to the cells from which spores are derived.
- archesporium — archespore.
- archibenthos — the ocean bottom between the littoral and abyssal zones: from depths of approximately 200 feet (60 meters) to 3300 feet (1000 meters).
- archipelagos — Plural form of archipelago.
- archive site — (networking) (Or "FTP site", "FTP archive") An Internet host where program source, documents, e-mail or news messages are stored for public access via anonymous FTP, Gopher, web or other document distribution system. There may be several archive sites (mirrors) for, e.g., a Usenet newsgroup though one may be recognised as the main one. FTP servers were common on the Internet for about ten years but have been largely replaced by web servers since the invention of the World-Wide Web and its HTTP protocol. Some well-known archive sites included Imperial College, UK, UUNET, USA, GNU archive site. The archie service attempted to index the contents of FTP archives, foreshadowing the indexing of the web by Google and others.
- arenaviruses — Plural form of arenavirus.
- arfvedsonite — a type of hornblende with the composition Na3(Fe,Mg)4FeSi8O22(OH)2
- argillaceous — (of sedimentary rocks and deposits) composed of very fine-grained material, such as clay, shale, etc
- ariel sharon — Ariel, 1928–2014, Israeli military and political leader; prime minister 2001–06.
- aristophanes — ?448–?380 bc, Greek comic dramatist, who satirized leading contemporary figures such as Socrates and Euripides. Eleven of his plays are extant, including The Clouds, The Frogs, The Birds, and Lysistrata
- aristotelian — of or relating to Aristotle or his philosophy
- arming chest — a chest for holding armor and weapons.
- arquebusiers — harquebusier.
- arraignments — Plural form of arraignment.
- arsenic acid — a white poisonous soluble crystalline solid used in the manufacture of arsenates and insecticides. Formula: H3AsO4
- arseniferous — Lb geology Containing or producing arsenic.
- arseniureted — combined with arsenic
- arsenopyrite — a white or grey metallic mineral consisting of a sulphide of iron and arsenic that forms monoclinic crystals with an orthorhombic shape: an ore of arsenic. Formula: FeAsS
- arsphenamine — a drug containing arsenic, formerly used in the treatment of syphilis and related infections
- artaxerxes i — died 425 bc, king of Persia (465–425): son of Xerxes I
- arteriograms — Plural form of arteriogram.
- arthrotomies — Plural form of arthrotomy.
- artillerists — Plural form of artillerist.
- ascertaining — to find out definitely; learn with certainty or assurance; determine: to ascertain the facts.
- asking price — The asking price of something is the price which the person selling it says that they want for it, although they may accept less.
- asparaginase — an enzyme used in treating leukaemia