Archstone is valid Scrabble Word

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

Definitions for ARCHSTONE in dictionary:

Words related to ARCHSTONE

archstones15

Words that contain ARCHSTONE

archstones15
Find what other words can be done using letters: "archstone"
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