expert, skilled, skilful, masterly, virtuoso, master, consummate, proficient, talented, gifted, adept, adroit, deft, dexterous, able, good, competent, capable, efficient, experienced, seasoned, trained, practised, professional, polished, well versed, versed, smart, clever, ingenious, ready, apt, handy, artful;

magnificent, brilliant, splendid, marvellous, impressive, excellent, formidable, outstanding, first-class, first-rate, fine;

deadly

informal great, mean, wicked, nifty, crack, ace

British informal a dab hand at

North American informal crackerjack, badass

British informal, dated wizard

vulgar slang shit-hot

archaic or humorous compleat

rare habile