Synonyms for A-one:

• n.

  •
  • boss,
  • superb,
  • fine,
  • first class,
  • excellent,
  • bully,
  • champion,
  • quality,
  • good,
  • swell,
  • capital,
  • terrific,
  • top,
  • brag,
  • great,
  • banner,
  • dandy,
  • splendid,
  • prime.
  •a-one (noun)
  • superior.

• Other synonyms:

  •
  • tophole,
  • topflight,
  • blue-ribbon.
  •Other relevant words:
  • au fait,
  • skilful,
  • better,
  • adroit,
  • adept,
  • fantastic,
  • polished,
  • high-class,
  • knowledgeable,
  • high-end,
  • masterful,
  • trained,
  • qualified,
  • tip-top,
  • accomplished,
  • dexterous,
  • top-drawer,
  • practised,
  • learned,
  • masterly,
  • super-duper,
  • top-grade,
  • skilled,
  • experienced,
  • proficient,
  • wonderful,
  • expert,
  • finished.

Antonyms for A-one:

• adj.

  • Other antonyms:
    inferior.