Jackstone is valid Scrabble Word

Is jackstone a scrabble word?
Official Scrabble Players Dictionary NO
Official Tournament and Club Word List YES
Collins Scrabble Words YES
Is jackstone valid Words with Friends?
Words with Friends NO

Definitions for JACKSTONE in dictionary:

Words that contain JACKSTONE

jackstones23
Find what other words can be done using letters: "jackstone"
https://scrabble-word.com/finder/jackstone
SCRABBLE® is a registered trademark. We do not cooperate with the owners of this trademark. All trademark rights are owned by their owners and are not relevant to the web site "scrabble-word.com". This site is intended for entertainment and training. We try to make a useful tool for all fans of SCRABBLE. "Scrabble Word" is the best method to improve your skills in the game.