Merriam-Webster's Dictionary and Thesaurus - Merriam-Webster [78]
arch·fiend noun : a chief fiend; especially : SATAN
ar·chi·epis·co·pal adjective : of or relating to an archbishop
ar·chi·man·drite noun : a dignitary in an Eastern church ranking below a bishop
ar·chi·pel·a·go noun, plural -goes or -gos : a group of islands
ar·chi·tect noun 1 : a person who plans buildings and oversees their construction
2 : a person who designs and guides a plan or undertaking
ar·chi·tec·ture noun 1 : the art or science of planning and building structures
2 : a method or style of building
3 : the manner in which the elements (as of a design) are arranged or organized
— ar·chi·tec·tur·al adjective
— ar·chi·tec·tur·al·ly adverb
ar·chi·trave noun : the supporting horizontal member just above the columns in a building in the classical style of architecture
ar·chive noun : a place for keeping public records; also : public records — often used in pl.
ar·chi·vist noun : a person in charge of archives
ar·chon noun : a chief magistrate of ancient Athens
arch·way noun : a passageway under an arch; also : an arch over a passage
arc lamp noun : a gas-filled electric lamp that produces light when a current arcs between incandescent electrodes
1arctic adjective [ORIGIN: ME artik, fr. L arcticus, fr. Gk arktikos, fr. arktos bear, Ursa Major, north]
1 often cap : of or relating to the north pole or the region near it
2 : bitter cold : FRIGID
Synonyms
bitter, cold, freezing, frigid, frosty, glacial, icy, polar
2arctic noun : a rubber overshoe that reaches to the ankle or above
arctic circle noun, often cap A&C : the parallel of latitude that is approximately 66 1/2 degrees north of the equator
-ard also -art noun suffix : one that is characterized by performing some action, possessing some quality, or being associated with some thing esp. conspicuously or excessively ar·dent adjective 1 : characterized by warmth of feeling typically expressed in eager zealous support or activity 2 : FIERY, HOT 3 : GLOWING — ar·dent·ly adverb Synonyms burning, charged, emotional, fervent, feverish, fiery, impassioned, passionate, vehement, warm—more at FERVENT avid, eager, enthusiastic, gung ho, hot, hungry, keen—more at EAGER ar·dor noun 1 a : warmth of feeling b : eagerness and ardent interest in pursuit of something 2 : sexual excitement Synonyms [1a] emotion, fervency, fervor, heat, intensity, passion, vehemence, warmth; also histrionics, mawkishness, melodrama, sentimentality Antonyms impassivity [1b] appetite, avidity, eagerness, enthusiasm, excitement, hunger, impatience, keenness, thirst—more at EAGERNESS ar·du·ous adjective 1 : hard to accomplish or achieve : DIFFICULT 2 : marked by great labor or effort — ar·du·ous·ness noun Synonyms [1, 2] demanding, difficult, exacting, formidable, grueling, hard, laborious, strenuous, toilsome, tough—more at HARD ar·du·ous·ly adverb : in an arduous manner 1are present 2d singular or present plural of BE 2are noun : a metric measure equal to 100 square meters ar·ea noun 1 : a flat surface or space 2 : the amount of surface included (as within the lines of a geometric figure) 3 : range or extent of some thing or concept : FIELD 4 : any particular extent of space or surface : REGION Synonyms [3] arena, demesne, department, discipline, domain, field, line, province, realm, specialty, sphere—more at FIELD [4] demesne, field, region, zone—more at REGION area code noun : a 3-digit number that identifies each telephone service area in a country (as the U.S. or Canada) are·na noun [ORIGIN: L harena, arena sand, sandy place] 1 : an enclosed area used for public entertainment 2 : a sphere of activity or competition Synonyms [1] hall, theater—more at HALL [2] area, demesne, department, discipline, domain, field, line, province, realm, specialty, sphere—more at FIELD Ar·gen·tine or Ar·gen·tin·ean or Ar·gen·tin·i·an noun : a native or inhabitant of Argentina — Argentine