" expertness "

1: as in experience, expertise;

•  Synonyms : 

•  experience,

•  expertise,

•  know-how,

•  proficiency,

•  dexterity,

•  ease,

•  finesse,

•  handiness,

•  creativity,

•  ingenuity,

•  inventiveness,

•  knowledge,

•  learning,

•  adeptness,

•  adroitness,

•  art,

•  artfulness,

•  artifice,

•  artistry,

•  cleverness,

•  craft,

•  cunning,

•  deftness,

•  masterfulness,

•  skill,

•  skillfulness,

•  aptitude,

•  bent,

•  flair,

•  gift,

•  knack,

•  talent

•  Antonyms : 

•  artlessness,

•  ineptitude,

•  ineptness,

•  maladroitness,

•  amateurishness,

•  awkwardness,

•  clumsiness,

•  crudeness,

•  klutziness,

•  rudeness,

•  inability,

•  inadequacy,

•  inadequateness,

•  incapability,

•  incapacity,

•  incompetence,

•  ineffectiveness,

•  ineffectuality,

•  ineffectualness,

•  inefficacy,

•  inefficiency

1: accomplished with trained ability;

  * e.g., " ... to a serious collector, the expert carving on the duck decoy justifies its high price "

•  Synonyms : 

•  adroit,

•  artful,

•  bravura,

•  deft,

•  delicate,

•  dexterous,

•  masterful,

•  masterly,

•  practiced,

•  skillful,

•  virtuoso,

•  workmanlike

•  Antonyms : 

•  amateur,

•  amateurish,

•  artless,

•  rude,

•  unprofessional,

•  unskillful

2: having or showing exceptional knowledge, experience, or skill in a field of endeavor;

  * e.g., " ... people interested in laser eye surgery are advised to seek out an expert practitioner "

•  Synonyms : 

•  accomplished,

•  ace,

•  adept,

•  compleat,

•  complete,

•  consummate,

•  crack,

•  crackerjack,

•  educated,

•  experienced,

•  good,

•  great,

•  master,

•  masterful,

•  masterly,

•  practiced,

•  professed,

•  proficient,

•  skilled,

•  skillful,

•  versed,

•  veteran,

•  virtuoso

•  Antonyms : 

•  amateur,

•  amateurish,

•  inexperienced,

•  inexpert,

•  jackleg,

•  unprofessional,

•  unseasoned,

•  unskilled,

•  unskillful