Synonyms for Piece of one's mind:

• n.

  •reprimand (noun)
  • castigation,
  • blame,
  • censure,
  • going over,
  • lecture,
  • comeuppance,
  • grooming,
  • reproof,
  • admonition,
  • chiding,
  • reprehension,
  • scolding,
  • bawling out,
  • tongue-lashing,
  • admonishment,
  • dressing-down,
  • rap,
  • rebuke.

• Other synonyms:

  •Other relevant words:
  • dressing,
  • roasting,
  • Setdown,
  • wigging.

Antonyms for Piece of one's mind:

• n.

  • reprimand
    compliment, praise, commendation, reward, forgiveness.