| Abattoir | A building where animals are butchered | 
                                                                
                                    | Abdication | An act of abdicating or renouncing the throne | 
                                                                
                                    | Accident | That which falls to someone or something | 
                                                                
                                    | Acoustics | Study of sound and sound waves | 
                                                                
                                    | Acrophobia | An extreme or irrational fear of heights | 
                                                                
                                    | Acumen | An ability to make good judgments and take quick decisions | 
                                                                
                                    | Aeon | Indefinite period of time | 
                                                                
                                    | Aerophobia | An irrational fear of fresh air or drafts of air | 
                                                                
                                    | Aesthetics | Appreciation of beauty, by a set of principles. | 
                                                                
                                    | Agnostic | One who is not sure about God?s existence | 
                                                                
                                    | Agony | Extreme physical or mental sufferings | 
                                                                
                                    | Agoraphobia | Phobia of open places | 
                                                                
                                    | Aikido | Japanese form of self-defence with the usage of locks holds | 
                                                                
                                    | Alchemy | The medieval forerunner of chemistry | 
                                                                
                                    | Algophobia | Phobia of pain | 
                                                                
                                    | Allegory | A story, poem, or picture that can be interpreted to reveal a hidden meaning, typically a moral or political one | 
                                                                
                                    | Alma Mater | The school or college one attends | 
                                                                
                                    | Almanac | An annual calendar containing important dates and statistical information such as astronomical data and tide tables | 
                                                                
                                    | Amateur | One who does a thing for pleasure and not as a profession | 
                                                                
                                    | Ambidextrous | One who can use either hand with ease | 
                                                                
                                    | Ambivalent | One who has mixed feelings | 
                                                                
                                    | Ambulance | A carriage for sick people | 
                                                                
                                    | Amphibian | A cold-blooded vertebrate animal that is born in water and breathes with gills | 
                                                                
                                    | Anarchist | A person who believes in or tries to bring about a state of lawlessness | 
                                                                
                                    | Anarchy | A state of disorder due to absence or non-recognition of authority or other controlling systems | 
                                                                
                                    | Anchor | A person who presents a radio/television programme | 
                                                                
                                    | Andromania | Madness or obsession with males | 
                                                                
                                    | Androphile | One who loves men | 
                                                                
                                    | Anglophile | One who loves and admires the British | 
                                                                
                                    | Annotate | An ability to add diagrams or explanation to a written context | 
                                                                
                                    | Anorexia | An emotional disorder characterized by an obsessive desire to lose weight by refusing to eat | 
                                                                
                                    | Anthropologist | One who studies the evolution of mankind | 
                                                                
                                    | Anthropology | The study of mankind | 
                                                                
                                    | Antipathy | Strong, deep dislike | 
                                                                
                                    | Anuptaphile | A person who loves staying single | 
                                                                
                                    | Apiary | A place where bees are kept; a collection of beehives | 
                                                                
                                    | Apostate | A person who has changed his faith | 
                                                                
                                    | Aquarium | A building containing tanks of live fish of different species | 
                                                                
                                    | Arbitrator | A person appointed by two parties to solve a dispute | 
                                                                
                                    | Archaeology | The study of ancient things | 
                                                                
                                    | Archives | A collection of historical documents or records providing information about a place, institution, or group of people | 
                                                                
                                    | Arena | A place or scene of activity, debate, or conflict | 
                                                                
                                    | Aristocracy | A form of government in which power is held by the nobility | 
                                                                
                                    | Arsenal | A collection of weapons and military equipment | 
                                                                
                                    | Arsonist | A person who deliberately sets fire to a building | 
                                                                
                                    | Ascetic | One who leads an austere life | 
                                                                
                                    | Astronaut | A person who is trained to travel in a spacecraft | 
                                                                
                                    | Astronomy | Study of celestial bodies | 
                                                                
                                    | Asylum | An institution for the care of people who are mentally ill | 
                                                                
                                    | Atheist | One who does not believe in the existence of God | 
                                                                
                                    | Auditor | One who makes an official examination of accounts | 
                                                                
                                    | Auditorium | The part of a theatre where people who are watching and listening sit | 
                                                                
                                    | Autobiography | Writing of one's own life story | 
                                                                
                                    | Autocracy | A system of government by one person with absolute power | 
                                                                
                                    | Autogamy | Self-fertilization especially in plants | 
                                                                
                                    | Autograph | A signature of a celebrity (signature of oneself) | 
                                                                
                                    | Automatic | A machine that functions by itself | 
                                                                
                                    | Automobile | A self-moving vehicle | 
                                                                
                                    | Autonomy | A self-governing country or region | 
                                                                
                                    | Autophobia | Fear of being egoistical, alone or isolated | 
                                                                
                                    | Aviary | A large cage, building, or enclosure to keep birds? | 
                                                                
                                    | Aviation | Study of flying aero planes | 
                                                                
                                    | Axiom | A statement or proposition on which an abstractly defined structure is based |