Vates (Latin)

1.  a poet; a poetess: This is the oldest Latin name for a poet. It fell into disuse (“poëta” was used instead) until it was restored to honour by Vergil.

2.  An oracle, i.e. a teacher, master, authority in any art or profession; a foreteller, seer, soothsayer~

A prophet

Prophet

From Greek: pro (for) + phanai (to speak)

1.    One who utters divinely inspired revelations

2.    One gifted with more than ordinary spiritual and moral insight, especially an inspired poet

3.    One who foretells future events

4.    An effective or leading spokesperson for a cause, doctrine, or group