"Stringboard" validity in different word game dictionaries

Dictionary Validity
Scrabble US(US/Canada/Thailand - TWL/NWL) No
Scrabble UK(International - SOWPODS/CSW) Yes
Words with Friends(WWF) Yes

"stringboard" Definition

  1. a board or built-up facing used in stair building to cover the ends of the steps and hide the true string

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