Moralize vs Moralizer - What's the difference?

As a verb moralize

is to apply to a moral purpose; to explain in a moral sense; to draw a moral from.

one who moralizes.

To apply to a moral purpose; to explain in a moral sense; to draw a moral from.

* L'Estrange

This fable is moralized in a common proverb.

* Shakespeare

Did he not moralize this spectacle?

To furnish with moral lessons, teachings, or examples; to lend a moral to.

* Wordsworth

While chastening thoughts of sweetest use, bestowed / By Wisdom, moralize his pensive road.

To render moral; to correct the morals of.

* D. Ramsay

It had a large share in moralizing the poor white people of the country.

To give a moral quality to; to affect the moral quality of, either for better or worse.

* Sir Thomas Browne

Good and bad stars moralize not our actions.

To make moral reflections; to regard acts and events as involving a moral.

(en noun)

One who moralizes.