Words starting with A that are validated

• American elm — Noun – English ～ large ornamental tree with graceful gradually spreading branches common in eastern North America
• Anna-Else — First name – Danish
• Anne-Else — First name – Danish
• air embolism — Noun – English ～ obstruction of the circulatory system caused by an air bubble as, e.g., accidentally during surgery or hypodermic injection or as a complication from scuba diving
• air embolism — Noun – English ～ pain resulting from rapid change in pressure
• all-embracing — Adjective – English ～ broad in scope or content; "across-the-board pay increases"; "an all-embracing definition"; "blanket sanctions against human-rights violators"; "an invention with broad applications"; "a panoptic study of Soviet nationality"- T.G.Winner; "granted him wide powers"
• Anna-Emilie — First name – Danish
• all-encompassing — Adjective – English ～ broad in scope or content; "across-the-board pay increases"; "an all-embracing definition"; "blanket sanctions against human-rights violators"; "an invention with broad applications"; "a panoptic study of Soviet nationality"- T.G.Winner; "granted him wide powers"
• accommodation endorser — Noun – English ～ a person who endorses a promissory note without compensation or benefit but simply as a favor to the borrower
• alternative energy — Noun – English ～ energy derived from sources that do not use up natural resources or harm the environment
• activation energy — Noun – English ～ the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur; "catalysts are said to reduce the energy of activation during the transition phase of a reaction"
• atomic energy — Noun – English ～ the energy released by a nuclear reaction
• Atomic Energy Commission — Noun – English ～ a former executive agency (from 1946 to 1974) that was responsible for research into atomic energy and its peacetime uses in the United States
• aircraft engine — Noun – English ～ the engine that powers and aircraft
• automobile engine — Noun – English ～ the engine that propels an automobile
• auxiliary engine — Noun – English ～ (nautical) a small engine (as one used on board ships to operate a windlass)
• army engineer — Noun – English ～ a member of the military who is trained in engineering and construction work
• automotive engineer — Noun – English ～ an engineer concerned with the design and construction of automobiles
• aeronautical engineer — Noun – English ～ an engineer concerned with the design and construction of aircraft
• aerospace engineer — Noun – English ～ an engineer of aircraft and space vehicles

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