"Obsidional" 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) No

"obsidional" Definition

  1. of or relating to a siege
  2. [of a piece of money] issued for use during a siege

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