Here are all the suggestions
Everybody wrote:
Aardvark (A nocturnal burrowing African mammal with long ears and a tubular snout)
Abelian (Adjective used to describe groups having members related by a commutative operation)
Abhorrent (Inspiring disgust and loathing)
Abobo (Mutated human used in quest to destroy Billy and Jimmy Lee, the Double Dragons)
Aboulomania (pathological indecisiveness)
Accorn (Common misspelling of the acronym for the controvertial "Association of Community Organizations for Reform Now" organization)
Acolyte (A person assisting the celebrant in a religious service or procession)
Acronym (A word formed from the initial letters of other words (AWFFTILOOW))
Acrophobia (Fear of heights)
Acropolis (A citadel or fortified part of an ancient Greek city, typically built on a hill)
Adriatica (Swiss Watch brand specializing in making quality watches at affordable prices)
Aerondite (A weapon from the game "Witcher 2")
Aggravation (an exasperated feeling of annoyance )
Agoraphobic (Fear of open and public spaces)
AlakaBAM! (Portmanteau BAM music format and the Pokémon Alakazam, named for a meaningless magic word)
Alakazam (The Pokémon Alakazam, named for a meaningless magic word)
Alectormancy (Alternate spelling of "Alectryomancy", divination using a rooster, sometimes by killing it, but usually by observing its motions)
Algorithm (A process or set of rules to be followed in calculations)
Alkaline (Any chemical with the ability neutralize acids to the equivalence point of carbonate or bicarbonate. Not to be confused with basity)
Alligator (A large semiaquatic reptile)
Allons-y (French catchphrase used by the 10th Dr. Who to excuse himself from situations)
Allosaurus (Late Jurassic carnivorous dinosaur; similar to but somewhat smaller than tyrannosaurus)
Aloser (Everyones favorite Tactics Ogre character)
Alot (Beast that resembles a cross between a bear, a yak and a pug, which materializes whenever anyone concatenates the words in "a lot")
Alphanumeric (Consisting of or using both letters and numerals)
Amusement (The state or experience of finding something funny)
Amyosthenia (failure of muscular strength)
Anaconda (A terrible 1997 horror flick starring Jennifer Lopez, Ice Cube and Jon Voight)
Anatidaephobia (fear that somewhere, somehow, a duck is watching you)
Androgynous (Having a mixture of male and female features)
Annual (A thing which happens once a year)
Antidisestablishmentarianism (Opposition to the 19th century proposal to remove the Church of England's status as official state church)
Antithesis (A thing that is the direct opposite of another thing)
Antleraxe (A primitive cutting tool made from an animal's antler)
Anubis (Jackal-headed ancient Egyptian god of mummification and afterlife)
Apatosaurus (huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic)
Aperture (United States-based scientific research corporation founded by Cave Johnson, known for their work on hygienic shower curtain technology for the US navy)
Apolcalypse (Misspelling of the complete final destruction of the world, especially as portrayed in the Revelation of St. John)
Apoplectic (A stroke, or a state of being overcome with anger that resembles the symptoms of a stroke)
Apoptosis (programmed cell death)
Apothecary (In colonial times, A person who prepared and sold medicines and drugs)
Aprobobo (A word which occasionally appears in Spanish, French, and German text, but for which Google translate has no translation. This thread on this forum is the top search result for "Aprobobo")
Arachnophobia (Extreme or irrational fear of spiders, which some would argue is not even slightly irrational)
Arbol-berries (A whimsical anglicisation of "Chile de árbol", a potent red pepper used in cooking)
Arc (A part of the circumference of a circle or other curve)
Argillaceous (of or resembling clay)
Arithmetic (The branch of mathematics dealing with the properties and manipulation of numbers)
Arithmomania (obssessive preoccupation with numbers)
Arrgh (An exclaimation of annoyance, exasperation, or other negative factor)
Arrrr! (...ye scurvy dogs, fetch me rum, or I'll keel-haul the lot o' ye!)
Artiubberchoke (A terrifying hybrid of Artichoke and land-lubber. This thread on this forum is currently the ONLY search result for this word.)
Asparagus (a tall of plant of the lily family with fine feathery foliage, cultivated for its edible shoots)
Astatine (the heaviest halogen element)
Astrodersion (A completely made-up word for abrasions on the surface of a spacecraft caused by micrometeorites. This thread on this forum is currently the ONLY search result for this word.)
Atarashii (the 13th single released by Japanese pop duo Puffy AmiYumi)
Attrition (process of gradually reducing the strength or effectiveness of someone or something through sustained attack or pressure)
Audiophile (An enthusiast of hi-fidelity audio)
Autonomy (The right or condition of self-government)
Avast (...ye scurvy dogs, fetch me rum, or I'll keel-haul the lot o' ye!)
Awesemondoradicus (A person who's awesomeness is equal to the radius of the world. This thread on this forum is currently the ONLY search result for this word.)
Azarth (OkCupid dating profile name of someone 21 / M / Minneapolis, Minnesota)
Azimer (An Audio HLE Audio, SPU utility)
Azimuth (The direction of a celestial object from the observer, expressed as the angular distance from the north or south point of the horizon to the point at which a vertical circle passing through the object intersects the horizon)
I was going to add short descriptions of all of them in parenthesis, but then I decided I probably have more important things to do for the next two hours.
My current favorite is Alectormancy or maybe Alectormancer. The wikipedia article for that word redirects to Alectryomancy which does uses roosters, but does not require killing them... although it doesn't have the same ring to it.
Alot and Abobo are also delightful.
Many really good suggestions. I am feeling pretty Aboulomaniac about this.
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