Is jehu a word in the Scrabble Dictionary

Yes, jehu is playable

...and is worth 16 points.

Found in the following dictionaries

Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)

"Jehu" Definition

noun

A coachman; a driver; especially, one who drives furiously.
Source: Wiktionary
A king of Israel in the ninth century who according to the account in II Kings had Jezebel killed in accordance with Elijah's prophecy.
A driver of a coach or cab.