castigator

Johnson, Goldsmith's growling monitor and unsparing castigator in times of heedless levity, stood by him at present with that protecting kindness with which he ever befriended him in time of need.

From Oliver Goldsmith A Biography by Washington Irving

So esteeming it, she had played the part of castigator.

From An Ambitious Woman A Novel by Edgar Fawcett

The true castigator of morals has never striven to make his subjects appear disgraceful, but to make them appear ridiculous.

From Hilaire Belloc The Man and His Work by G. K. (Gilbert Keith) Chesterton

Mr. Stevenson hints that she vanquished his stubborn heart by correcting a 'false quantity' of his one day, for he was the man to reflect over a correction, and 'admire the castigator.'

From Heroes of the Telegraph by John Munro

It is somewhat harder to understand the universal assumption of our authorities that Euripides was a notorious castigator of the female sex and that the women of Athens naturally hated him.

From Euripedes and His Age by Gilbert Murray