12-Letter Nouns Starting With A

Here's the list of all the 841 12-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)
availability
1. the quality of being at hand when needed
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architecture
1. an architectural product or work
2. the discipline dealing with the principles of design and construction and ornamentation of fine buildings
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announcement
1. a formal public statement
2. a public statement containing information about an event that has happened or is going to happen
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appreciation
1. understanding of the nature or meaning or quality or magnitude of something
2. delicate discrimination (especially of esthetic values)
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anthropology
1. the social science that studies the origins and social relationships of human beings
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acceleration
1. an increase in rate of change
2. the act of accelerating; increasing the speed
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accumulation
1. an increase by natural growth or addition
2. several things grouped together or considered as a whole
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aromatherapy
1. the therapeutic use of aromatic plant extracts and essential oils in baths or massage
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augmentation
1. the amount by which something becomes greater
2. the statement of a theme in notes of greater duration (usually twice the length of the original)
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amortization
1. the reduction of the value of an asset by prorating its cost over a period of years
2. payment of an obligation in a series of installments or transfers
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authenticity
1. undisputed credibility
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anticipation
1. an expectation
2. something expected (as on the basis of a norm)
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abbreviation
1. a shortened form of a word or phrase
2. shortening something by omitting parts of it
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astrophysics
1. the branch of astronomy concerned with the physical and chemical properties of celestial bodies
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authenticateMore Definitions →
acquaintance
1. personal knowledge or information about someone or something
2. a relationship less intimate than friendship
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articulation
1. the aspect of pronunciation that involves bringing articulatory organs together so as to shape the sounds of speech
2. the shape or manner in which things come together and a connection is made
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assimilation
1. the state of being assimilated; people of different backgrounds come to see themselves as part of a larger national family
2. the social process of absorbing one cultural group into harmony with another
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adjudication
1. the final judgment in a legal proceeding; the act of pronouncing judgment based on the evidence presented
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agribusiness
1. a large-scale farming enterprise
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alphanumericMore Definitions →
apprehension
1. fearful expectation or anticipation
2. the cognitive condition of someone who understands
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annihilation
1. destruction by annihilating something
2. total destruction
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adaptability
1. the ability to change (or be changed) to fit changed circumstances
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amphitheatre
1. a sloping gallery with seats for spectators (as in an operating room or theater)
2. an oval large stadium with tiers of seats; an arena in which contests and spectacles are held
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amphitheater
1. a sloping gallery with seats for spectators (as in an operating room or theater)
2. an oval large stadium with tiers of seats; an arena in which contests and spectacles are held
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amalgamation
1. the combination of two or more commercial companies
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angiogenesis
1. the formation of new blood vessels
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astonishment
1. the feeling that accompanies something extremely surprising
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aerodynamics
1. the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow
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amortisation
1. the reduction of the value of an asset by prorating its cost over a period of years
2. payment of an obligation in a series of installments or transfers
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astrobiology
1. the branch of biology concerned with the effects of outer space on living organisms and the search for extraterrestrial life
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astronautics
1. the theory and practice of navigation through air or space
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appendicitis
1. inflammation of the vermiform appendix
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afterthought
1. thinking again about a choice previously made
2. an addition that was not included in the original plan
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alimentation
1. a source of materials to nourish the body
2. the act of supplying food and nourishment
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abolitionist
1. a reformer who favors abolishing slavery
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annunciation
1. a formal public statement
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arthroplasty
1. surgical reconstruction or replacement of a malformed or degenerated joint
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acquiescence
1. acceptance without protest
2. agreement with a statement or proposal to do something
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autoimmunity
1. production of antibodies against the tissues of your own body; produces autoimmune disease or hypersensitivity reactions
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acetaldehyde
1. a colorless volatile water-soluble liquid aldehyde used chiefly in the manufacture of acetic acid and perfumes and drugs
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alstroemeria
1. any of various South American plants of the genus Alstroemeria valued for their handsome umbels of beautiful flowers
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advisability
1. the quality of being advisable
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amelioration
1. the act of relieving ills and changing for the better
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azathioprine
1. an immunosuppressive drug (trade name Imuran) used to prevent rejection of a transplanted organ
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administrateMore Definitions →
alliteration
1. use of the same consonant at the beginning of each stressed syllable in a line of verse
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archeologist
1. an anthropologist who studies prehistoric people and their culture
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augmentativeMore Definitions →
antimalarial
1. a medicinal drug used to prevent or treat malaria
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adulteration
1. being mixed with extraneous material; the product of adulterating
2. the act of adulterating (especially the illicit substitution of one substance for another)
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asphyxiation
1. the condition of being deprived of oxygen (as by having breathing stopped)
2. killing by depriving of oxygen
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12-Letter Nouns Starting With A