13-Letter Nouns Starting With A

Here's the list of all the 584 13-Letter Nouns Starting With A in the English Language.

The list is arranged by the word lengths. Click on the length below to jump to the relevant section of the page.

Common Nouns (with Definitions and Examples)
accommodation
1. making or becoming suitable; adjusting to circumstances
2. a settlement of differences
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advertisement
1. a public promotion of some product or service
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administrator
1. someone who administers a business
2. the party appointed by a probate court to distribute the estate of someone who dies without a will or without naming an executor
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accessibility
1. the quality of being at hand when needed
2. the attribute of being easy to meet or deal with
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authorization
1. a document giving an official instruction or command
2. the power or right to give orders or make decisions
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accreditation
1. the act of granting credit or recognition (especially with respect to an educational institution that maintains suitable standards)
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appropriation
1. money set aside (as by a legislature) for a specific purpose
2. incorporation by joining or uniting
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approximation
1. an approximate calculation of quantity or degree or worth
2. the quality of coming near to identity (especially close in quantity)
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autobiography
1. a biography of yourself
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applicability
1. relevance by virtue of being applicable to the matter at hand
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assassination
1. an attack intended to ruin someone's reputation
2. murder of a public figure by surprise attack
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amplification
1. addition of extra material or illustration or clarifying detail
2. the amount of increase in signal power or voltage or current expressed as the ratio of output to input
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authorisation
1. a document giving an official instruction or command
2. the power or right to give orders or make decisions
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accompaniment
1. an event or situation that happens at the same time as or in connection with another
2. a musical part (vocal or instrumental) that supports or provides background for other musical parts
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acetaminophen
1. an analgesic for mild pain but not for inflammation; also used as an antipyretic; (Datril, Tylenol, Panadol, Phenaphen, Tempra, and Anacin III are trademarks of brands of acetaminophen tablets)
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antimicrobial
1. an agent (as heat or radiation or a chemical) that destroys microorganisms that might carry disease
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authoritarian
1. a person who behaves in a tyrannical manner
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apportionment
1. the act of distributing by allotting or apportioning; distribution according to a plan
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acceptability
1. satisfactoriness by virtue of conforming to approved standards
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antibacterial
1. any drug that destroys bacteria or inhibits their growth
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acetylcholine
1. a neurotransmitter that is a derivative of choline; released at the ends of nerve fibers in the somatic and parasympathetic nervous systems
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admissibility
1. acceptability by virtue of being admissible
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archaeologist
1. an anthropologist who studies prehistoric people and their culture
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amitriptyline
1. a tricyclic antidepressant drug (trade name Elavil) with serious side effects; interacts with many other medications
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argumentation
1. a discussion in which reasons are advanced for and against some proposition or proposal
2. a course of reasoning aimed at demonstrating a truth or falsehood; the methodical process of logical reasoning
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antipsychotic
1. tranquilizer used to treat psychotic conditions when a calming effect is desired
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accelerometer
1. an instrument for measuring the acceleration of aircraft or rockets
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authenticator
1. one who determines authenticity (as of works of art) or who guarantees validity
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airworthiness
1. fitness to fly
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assertiveness
1. aggressive self-assurance; given to making bold assertions
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anticoagulant
1. medicine that prevents or retards the clotting of blood
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agglomeration
1. a jumbled collection or mass
2. the act of collecting in a mass; the act of agglomerating
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antihistamine
1. a medicine used to treat allergies and hypersensitive reactions and colds; works by counteracting the effects of histamine on a receptor site
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acidification
1. the process of becoming acid or being converted into an acid
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afforestation
1. the conversion of bare or cultivated land into forest (originally for the purpose of hunting)
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actualization
1. making real or giving the appearance of reality
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amniocentesis
1. (pregnancy) extraction by centesis of amniotic fluid from a pregnant woman (after the 15th week of pregnancy) to aid in the diagnosis of fetal abnormalities
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acculturation
1. the adoption of the behavior patterns of the surrounding culture
2. all the knowledge and values shared by a society
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acrylonitrile
1. a colorless liquid unsaturated nitrile made from propene
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assemblywoman
1. a woman assemblyman
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arboriculture
1. the tending of and caring for trees
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agglutination
1. a clumping of bacteria or red cells when held together by antibodies (agglutinins)
2. the building of words from component morphemes that retain their form and meaning in the process of combining
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attentiveness
1. paying particular notice (as to children or helpless people)
2. the trait of being considerate and thoughtful of others
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aspergillosis
1. severe respiratory disease of birds that takes the form of an acute rapidly fatal pneumonia in young chickens and turkeys
2. an opportunistic infection by a fungus of the genus Aspergillus; characterized by inflammation and lesions of the ear and other organs
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arbitrariness
1. the trait of acting unpredictably and more from whim or caprice than from reason or judgment
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audiocassette
1. a cassette for audiotape
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13-Letter Nouns Starting With A