Augur vs Preacher - What's the difference?

As a noun augur

is augur (diviner who foretells events by the behaviour of birds), especially in the context of ancient rome.

alternative name for ecclesiastes, the twenty-first book of the old testament.

(wikipedia augur)

(en noun)

A diviner who foretells events by the behaviour of birds or other animals, or by signs derived from celestial phenomena, or unusual occurrences.

* Dryden

Augur of ill, whose tongue was never found / Without a priestly curse or boding sound.

(Ancient Rome) An official who interpreted omens before the start of public events.

To foretell events; to exhibit signs of future events.

To anticipate, to foretell, or to indicate a favorable or an unfavorable issue.

to augur well or ill

* augury

* * * ----

(wikipedia preacher) (en noun)

Someone who preaches a worldview, philosophy or religion, especially someone who preaches the Quran or the gospel; a clergyman.

* 2004 , Garbi Schmidt, Islam in Urban America: Sunni Muslims in Chicago , Page 171

* preacheress