"Superoctave" 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

"superoctave" Definition

  1. the octave above a specific note
  2. a metal organ flue stop of 2′ pitch in the manuals and 4′ pitch in the pedals

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