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Webster 1913 Edition

Noun.

One who chastises; a punisher; a corrector.

Jer. Taylor.

The

chastiser

of the rich.

Burke.

Noun.

One who chastises; a punisher; a corrector.

chastiser ‎(plural chastisers)

Someone who chastises
- 1779 Samuel Johnson (ed) - The Works of the English Poets
  That kind chastiser of thy soul in joy!
- 2000 A.C. Bhaktivedanta Swami Prabhupada - Bhagavadgita As It Is
  Having spoken thus, Arjuna, chastiser of enemies, told Krsna, "Govinda, I shall not fight," and fell silent.