Words starting with A that are validated

• Araucaria columnaris — Noun – English ～ very tall evergreen of New Caledonia and the New Hebrides similar to norfolk island pine
• armed combat — Noun – English ～ an engagement fought between two military forces
• Allied Command Atlantic — Noun – English ～ a major strategic headquarters of NATO located in the United States; is under the authority of the North Atlantic Council
• Air Combat Command — Noun – English ～ a command that is the primary provider of air combat weapon systems to the United States Air Force; operates fighter, bomber, reconnaissance, battle-management, and rescue aircraft
• arteria communicans — Noun – English ～ any of three arteries in the brain that make up the circle of Willis
• anomalous communication — Noun – English ～ communication by paranormal means
• animal communication — Noun – English ～ communication between animals (of the same species)
• auditory communication — Noun – English ～ communication that relies on hearing
• Anglican Communion — Noun – English ～ the national church of England (and all other churches in other countries that share its beliefs); has its see in Canterbury and the sovereign as its temporal head
• Amygdalus communis amara — Noun – English ～ almond trees having white blossoms and poisonous nuts yielding an oil used for flavoring and for medicinal purposes
• Amygdalus communis — Noun – English ～ small bushy deciduous tree native to Asia and North Africa having pretty pink blossoms and highly prized edible nuts enclosed in a hard green hull; cultivated in southern Australia and California
• Artocarpus communis — Noun – English ～ native to Pacific islands and having edible fruit with a texture like bread
• Ananas comosus — Noun – English ～ a tropical American plant bearing a large fleshy edible fruit with a terminal tuft of stiff leaves; widely cultivated in the tropics
• auto company — Noun – English ～ a company that makes and sells automobiles
• athletic competition — Noun – English ～ a contest between athletes
• alicyclic compound — Noun – English ～ an aliphatic compound that contains a ring of atoms
• aliphatic compound — Noun – English ～ organic compound that is an alkane or alkene or alkyne or their derivative
• anionic compound — Noun – English ～ a compound characterized by an active anion
• aromatic compound — Noun – English ～ a hydrocarbon containing one or more benzene rings that are characteristic of the benzene series of compounds
• air compressor — Noun – English ～ a compressor that takes in air at atmospheric pressure and delivers it at a higher pressure

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