"Superfamily" validity in different word game dictionaries

Dictionary Validity
Scrabble US(US/Canada/Thailand - TWL/NWL) Yes
Scrabble UK(International - SOWPODS/CSW) Yes
Words with Friends(WWF) Yes

"superfamily" Definition

  1. a category of biological classification ranking below an order and above a family
  2. a large group of closely related molecules or chemical compounds usually possessing a similar function

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