Opposite words for benison:
anathema, execration, malediction, curse, imprecation.
Usage samples:
  1. V. There journeyed by a bridal pomp, A bridegroom and his dame; He speaketh low for happiness, She blusheth red for shame: But never a tone of benison From out the lattice came.
    "The Poetical Works of Elizabeth Barrett Browning, Vol. I", Elizabeth Barrett Browning.
  2. With the ring, I would give thee my benison, but that I fear the blessing of so sinful a woman might do thee harm.
    "Stories and Legends of Travel and History, for Children", Grace Greenwood.
  3. They seemed, merely by their flight through the tense ganglia of her brain, to break into the awful loneliness of these recent tabernacles of the spirit, and bestow on them the benison denied them in its pride by the human family from whose bosom they had been torn.
    "The End of Her Honeymoon", Marie Belloc Lowndes.
  4. Reverend survivors from a vanished world, they looked out from the gloom of their abiding- place, but with no shade of menace or of malice in their silent presence; rather with a solemn benison on the fleeting creatures of to- day.
    "The Eye of Osiris", R. Austin Freeman.