| ablaut | (noun) a vowel whose quality or length is changed to indicate linguistic distinctions (such as sing sang sung song) | - |
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| ablution | (noun) the ritual washing of a priest's hands or of sacred vessels | - |
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| ablutionary | (adjective) cleansing the body by washing; especially ritual washing of e.g. hands | Synonyms: cleansing |
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| about | (adjective) on the move | Synonyms: astir |
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| (adverb) (of quantities) imprecise but fairly close to correct | Synonyms: approximately, around, close to, just about, more or less, or so, roughly, some |
| (adverb) in the area or vicinity | Synonyms: around |
| (adverb) in or to a reversed position or direction | Synonyms: around |
| (adverb) in rotation or succession | - |
| (adverb) used of movement to or among many different places or in no particular direction | Synonyms: around |
| (adverb) (of actions or states) slightly short of or not quite accomplished; all but | Synonyms: almost, most, near, nearly, nigh, virtually, well-nigh |
| (adverb) all around or on all sides | Synonyms: around |
| absolute | (adjective) perfect or complete or pure | - |
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| (adjective) not limited by law | - |
| (adjective) not capable of being violated or infringed | Synonyms: infrangible, inviolable |
| (adjective) expressing finality with no implication of possible change | - |
| (adjective) complete and without restriction or qualification; sometimes used informally as intensifiers | Synonyms: downright, out-and-out, rank, right-down, sheer |
| (noun) something that is conceived or that exists independently and not in relation to other things; something that does not depend on anything else and is beyond human control; something that is not relative | - |
| absolutely | (adverb) completely and without qualification; used informally as intensifiers | Synonyms: dead, perfectly, utterly |
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| (adverb) totally and definitely; without question | - |
| absoluteness | (noun) the quality of being absolute | - |
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| (noun) the quality of being complete or utter or extreme | Synonyms: starkness, utterness |
| absolution | (noun) the act of absolving or remitting; formal redemption as pronounced by a priest in the sacrament of penance | Synonyms: remission, remission of sin, remittal |
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| (noun) the condition of being formally forgiven by a priest in the sacrament of penance | - |
| absolutisation | (noun) the process of rendering something absolute or converting it into an absolute. | Synonyms: absolutization |
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| absolutism | (noun) the doctrine of an absolute being, often related to idealism in philosophy. | - |
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| (noun) an ideological belief in the complete and unrestricted power of government. | Synonyms: totalism, totalitarianism |
| (noun) a form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.) | Synonyms: authoritarianism, Caesarism, despotism, dictatorship, monocracy, one-man rule, shogunate, Stalinism, totalitarianism, tyranny |
| (noun) dominance through threat of punishment and violence | Synonyms: despotism, tyranny |
| absolutist | (adjective) pertaining to the principle of totalitarianism | Synonyms: absolutistic |
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| (noun) one who advocates absolutism | - |
| absolutistic | (adjective) pertaining to the principle of totalitarianism | Synonyms: absolutist |
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| absolutization | (noun) the process of rendering something absolute or converting it into an absolute. | Synonyms: absolutisation |
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| abut | (verb) lie adjacent to another or share a boundary | Synonyms: adjoin, border, butt, butt against, butt on, edge, march |
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| abutment | (noun) a masonry support that touches and directly receives thrust or pressure of an arch or bridge | - |
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| (noun) point of contact between two objects or parts | - |
| abutter | (noun) the owner of contiguous property | - |
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| accouter | (verb) provide with military equipment | Synonyms: accoutre |
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| accoutered | (adjective) provided with necessary articles of equipment for a specialized purpose (especially military) | Synonyms: accoutred |
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| accouterment | (noun) clothing that is worn or carried, but not part of your main clothing | Synonyms: accessory, accoutrement |
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| accoutre | (verb) provide with military equipment | Synonyms: accouter |
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| accoutred | (adjective) provided with necessary articles of equipment for a specialized purpose (especially military) | Synonyms: accoutered |
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| accoutrement | (noun) clothing that is worn or carried, but not part of your main clothing | Synonyms: accessory, accouterment |
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| acebutolol | (noun) an oral beta blocker (trade name Sectral) used in treating hypertension | Synonyms: Sectral |
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| acute | (adjective) having or experiencing a rapid onset and short but severe course | - |
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| (adjective) of an angle; less than 90 degrees | - |
| (adjective) of critical importance and consequence | - |
| (adjective) having or demonstrating ability to recognize or draw fine distinctions | Synonyms: discriminating, incisive, keen, knifelike, penetrating, penetrative, piercing, sharp |
| (adjective) ending in a sharp point | Synonyms: acuate, needlelike, sharp |
| (adjective) extremely sharp or severe | Synonyms: intense |
| (noun) a mark placed above a vowel to indicate pronunciation | Synonyms: acute accent, ague |
| acutely | (adverb) having a rapid onset | - |
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| (adverb) in a keen or penetrating way | Synonyms: keenly |
| (adverb) changing suddenly in direction and degree | Synonyms: sharp, sharply |
| (adverb) in a shrewd manner | Synonyms: astutely, sagaciously, sapiently, shrewdly |
| acuteness | (noun) the quality of having a sharp edge or point | - |
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| (noun) a quick and penetrating intelligence | Synonyms: acuity, keenness, sharpness |
| (noun) a sensitivity that is keen and highly developed | - |
| adjutant | (noun) large Indian stork with a military gait | Synonyms: adjutant bird, adjutant stork, Leptoptilus dubius |
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| (noun) an officer who acts as military assistant to a more senior officer | Synonyms: aide-de-camp, aide |
| aeronaut | (noun) someone who operates an aircraft | Synonyms: aviator, flier, flyer |
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| aeronautic | (adjective) of or pertaining to aeronautics | Synonyms: aeronautical |
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| aeronautical | (adjective) of or pertaining to aeronautics | Synonyms: aeronautic |
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| aeronautics | (noun) the theory and practice of navigation through air or space | Synonyms: astronautics |
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| aflutter | (adjective) excited in anticipation | Synonyms: nervous |
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| agglutinate | (adjective) united as if by glue | Synonyms: agglutinative |
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| (verb) clump together; as of bacteria, red blood cells, etc. | - |
| (verb) string together (morphemes in an agglutinating language) | - |
| agglutination | (noun) the building of words from component morphemes that retain their form and meaning in the process of combining | - |
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| (noun) a clumping of bacteria or red cells when held together by antibodies (agglutinins) | - |
| (noun) the coalescing of small particles that are suspended in solution; these larger masses are then (usually) precipitated | Synonyms: agglutinating activity |
| agglutinative | (adjective) united as if by glue | Synonyms: agglutinate |
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| (adjective) forming derivative or compound words by putting together constituents each of which expresses a single definite meaning | Synonyms: polysynthetic |
| agglutinin | (noun) an antibody that causes agglutination of a specific antigen | - |
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| agglutinogen | (noun) any substance that acts as an antigen to cause agglutinin production | - |
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| agouti | (noun) agile long-legged rabbit-sized rodent of Central America and South America and the West Indies; valued as food | Synonyms: Dasyprocta aguti |
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| albuterol | (noun) a bronchodilator (trade names Ventolin or Proventil) used for asthma and emphysema and other lung conditions; available in oral or inhalant forms; side effects are tachycardia and shakiness | Synonyms: Proventil, Ventolin |
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| allmouth | (noun) fishes having large mouths with a wormlike filament attached for luring prey | Synonyms: angler, angler fish, anglerfish, goosefish, Lophius Americanus, lotte, monkfish |
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| allocution | (noun) (rhetoric) a formal or authoritative address that advises or exhorts | - |
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| altazimuth | (noun) an instrument that measures the altitude and azimuth of celestial bodies; used in navigation | - |
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| amputate | (verb) remove surgically | Synonyms: cut off |
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| amputation | (noun) a surgical removal of all or part of a limb | - |
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| (noun) a condition of disability resulting from the loss of one or more limbs | - |
| amputator | (noun) a surgeon who removes part or all of a limb | - |
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| amputee | (noun) someone who has had a limb removed by amputation | - |
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| anacoluthia | (noun) an abrupt change within a sentence from one syntactic structure to another | Synonyms: anacoluthon |
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| anacoluthic | (adjective) of or related to syntactic inconsistencies of the sort known as anacoluthons | - |
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| anacoluthon | (noun) an abrupt change within a sentence from one syntactic structure to another | Synonyms: anacoluthia |
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| antiauthoritarian | (adjective) opposed to authoritarianism | - |
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| antineutrino | (noun) the antiparticle of a neutrino | - |
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| antineutron | (noun) the antiparticle of a neutron | - |
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| antipollution | (adjective) intended to reduce pollution | - |
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| aquanaut | (noun) an underwater swimmer equipped with a face mask and foot fins and either a snorkel or an air cylinder | Synonyms: skin-diver |
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| (noun) a skilled worker who can live in underwater installations and participate in scientific research | Synonyms: oceanaut |
| arbutus | (noun) any of several evergreen shrubs of the genus Arbutus of temperate Europe and America | - |
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| architeuthis | (noun) largest mollusk known about but never seen (to 60 feet long) | Synonyms: giant squid |
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| arcminute | (noun) a unit of angular distance equal to a 60th of a degree | Synonyms: minute, minute of arc |
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| argonaut | (noun) someone engaged in a dangerous but potentially rewarding adventure | - |
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| astronaut | (noun) a person trained to travel in a spacecraft | Synonyms: cosmonaut, spaceman |
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| astronautic | (adjective) of or belonging to astronauts or the science of astronautics | Synonyms: astronautical |
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| astronautical | (adjective) of or belonging to astronauts or the science of astronautics | Synonyms: astronautic |
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| astronautics | (noun) the theory and practice of navigation through air or space | Synonyms: aeronautics |
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| astute | (adjective) marked by practical hardheaded intelligence | Synonyms: sharp, shrewd |
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| astutely | (adverb) in a shrewd manner | Synonyms: acutely, sagaciously, sapiently, shrewdly |
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| astuteness | (noun) intelligence manifested by being astute (as in business dealings) | Synonyms: perspicaciousness, perspicacity, shrewdness |
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| (noun) the intellectual ability to penetrate deeply into ideas | Synonyms: deepness, depth, profoundness, profundity |
| attributable | (adjective) capable of being attributed | - |
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| attribute | (noun) an abstraction belonging to or characteristic of an entity | - |
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| (noun) a construct whereby objects or individuals can be distinguished | Synonyms: dimension, property |
| (verb) attribute or credit to | Synonyms: ascribe, assign, impute |
| (verb) decide as to where something belongs in a scheme | Synonyms: assign |
| attribution | (noun) assigning to a cause or source | Synonyms: ascription |
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| (noun) assigning some quality or character to a person or thing | Synonyms: ascription |
| attributive | (adjective) of adjectives; placed before the nouns they modify | Synonyms: prenominal |
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| attributively | (adverb) in an attributive manner | - |
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| autacoid | (noun) any physiologically active internal secretion especially one of uncertain classification | Synonyms: autocoid |
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| autacoidal | (adjective) of or relating to an autacoid | - |
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| autarchic | (adjective) of or relating to or characterized by autarchy | Synonyms: autarchical, autarkical |
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| autarchical | (adjective) of or relating to or characterized by autarchy | Synonyms: autarchic, autarkical |
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| autarchy | (noun) a political system governed by a single individual | Synonyms: autocracy |
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| (noun) economic independence as a national policy | Synonyms: autarky |
| autarkic | (adjective) of countries; not relying on imports | Synonyms: autarkical |
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| autarkical | (adjective) of or relating to or characterized by autarchy | Synonyms: autarchic, autarchical |
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| (adjective) of countries; not relying on imports | Synonyms: autarkic |
| autarky | (noun) economic independence as a national policy | Synonyms: autarchy |
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| auteur | (noun) a filmmaker who has a personal style and keeps creative control over his or her works | - |
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| authentic | (adjective) not counterfeit or copied | Synonyms: bona fide, unquestionable, veritable |
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| (adjective) conforming to fact and therefore worthy of belief | Synonyms: reliable |
| authentically | (adverb) genuinely; with authority | Synonyms: genuinely |
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| authenticate | (verb) establish the authenticity of something | - |
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| authenticated | (adjective) established as genuine | Synonyms: attested, documented |
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| authentication | (noun) validating the authenticity of something or someone | Synonyms: certification |
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| (noun) a mark on an article of trade to indicate its origin and authenticity | Synonyms: assay-mark, hallmark |
| authenticator | (noun) one who determines authenticity (as of works of art) or who guarantees validity | Synonyms: appraiser |
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| authenticity | (noun) undisputed credibility | Synonyms: genuineness, legitimacy |
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| author | (noun) writes (books or stories or articles or the like) professionally (for pay) | Synonyms: writer |
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| (noun) someone who originates or causes or initiates something | Synonyms: generator, source |
| (verb) be the author of | - |
| authoress | (noun) a woman author | - |
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| authorial | (adjective) of or by or typical of an author | Synonyms: auctorial |
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| authorisation | (noun) the act of conferring legality or sanction or formal warrant | Synonyms: authorization, empowerment |
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| (noun) the power or right to give orders or make decisions | Synonyms: authority, authorization, dominance, potency, say-so |
| (noun) official permission or approval | Synonyms: authority, authorization, sanction |
| (noun) a document giving an official instruction or command | Synonyms: authorization, mandate |
| authorise | (verb) grant authorization or clearance for | Synonyms: authorize, clear, pass |
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| (verb) give or delegate power or authority to | Synonyms: authorize, empower |
| authorised | (adjective) endowed with authority | Synonyms: authoritative, authorized |
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| authoriser | (noun) an authority who authorizes (people or actions) | Synonyms: authorizer |
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| authoritarian | (adjective) expecting unquestioning obedience | Synonyms: dictatorial, overbearing |
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| (adjective) characteristic of an absolute ruler or absolute rule; having absolute sovereignty | Synonyms: autocratic, despotic, dictatorial, tyrannic, tyrannical |
| (noun) a person who behaves in a tyrannical manner | Synonyms: dictator |
| authoritarianism | (noun) a form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.) | Synonyms: absolutism, Caesarism, despotism, dictatorship, monocracy, one-man rule, shogunate, Stalinism, totalitarianism, tyranny |
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| authoritative | (adjective) endowed with authority | Synonyms: authorised, authorized |
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| (adjective) having authority or ascendancy or influence | Synonyms: important |
| (adjective) of recognized authority or excellence | Synonyms: definitive |
| authoritatively | (adverb) in an authoritative and magisterial manner | Synonyms: magisterially |
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| authorities | (noun) the organization that is the governing authority of a political unit | Synonyms: government, regime |
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| authority | (noun) the power or right to give orders or make decisions | Synonyms: authorisation, authorization, dominance, potency, say-so |
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| (noun) official permission or approval | Synonyms: authorisation, authorization, sanction |
| (noun) freedom from doubt; belief in yourself and your abilities | Synonyms: assurance, confidence, self-assurance, self-confidence, sureness |
| (noun) an authoritative written work | - |
| (noun) an administrative unit of government | Synonyms: agency, bureau, federal agency, government agency, office |
| (noun) an expert whose views are taken as definitive | - |
| (noun) (usually plural) persons who exercise (administrative) control over others | - |
| authorization | (noun) the act of conferring legality or sanction or formal warrant | Synonyms: authorisation, empowerment |
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| (noun) the power or right to give orders or make decisions | Synonyms: authorisation, authority, dominance, potency, say-so |
| (noun) official permission or approval | Synonyms: authorisation, authority, sanction |
| (noun) a document giving an official instruction or command | Synonyms: authorisation, mandate |