Synonyms for Falseheartedness:

• n.

  •perfidiousness (noun)
  • fickleness,
  • treason,
  • doubt,
  • skepticism,
  • inconstancy,
  • fraud*,
  • disbelief.

• Other synonyms:

  •Other relevant words:
  • dirty trick,
  • foul play,
  • Improbity,
  • cunning,
  • hypocrisy,
  • artfulness,
  • perjury,
  • indirection,
  • duplicity,
  • artifice,
  • insincerity,
  • ambidexterity,
  • bad faith,
  • craft,
  • fraud,
  • wile,
  • intrigue,
  • furtiveness,
  • guile.