noun

a person who is very knowledgeable about or skilful in a particular area. "an expert in healthcare" синонимы: specialist, authority, pundit, oracle, resource person, adept, maestro, virtuoso, master, past master, professional, genius, wizard, connoisseur, aficionado, one of the cognoscenti, cognoscente, doyen, savant, ace, buff, ninja, pro, whizz, hotshot, old hand, alpha geek, dab hand, maven, crackerjack, proficient

adjective

having or involving a great deal of knowledge or skill in a particular area. "he had received expert academic advice" синонимы: skilful, skilled, adept, accomplished, talented, fine, master, masterly, brilliant, virtuoso, bravura, magnificent, marvellous, wonderful, outstanding, great, exceptional, superlative, formidable, excellent, dazzling, first-class, first-rate, elite, superb, proficient, good, able, apt, capable, competent, clever, experienced, practised, qualified, knowledgeable, well versed, specialist, professional, deft, dexterous, adroit, au fait, wizard, ace, stellar, class, crack, top-notch, out of this world, mean, A1, demon, genius, shit hot