'Preacher' in the Bible

How then will they call on him in whom they have not believed? How will they believe in him whom they have not heard? How will they hear without a preacher?

to which I was appointed a preacher and an apostle (I am telling the truth in Christ, not lying), a teacher of the Gentiles in faith and truth.

For this, I was appointed as a preacher, an apostle, and a teacher of the Gentiles.

and didn't spare the ancient world, but preserved Noah with seven others, a preacher of righteousness, when he brought a flood on the world of the ungodly;