Pyknodysostoses is valid Scrabble Word

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

Definitions for PYKNODYSOSTOSES in dictionary:

Words related to PYKNODYSOSTOSES

pyknodysostosis28
Find what other words can be done using letters: "pyknodysostoses"
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