Antichthones is valid Scrabble Word

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

Definitions for ANTICHTHONES in dictionary:

Similar words containing CHTHONE without suffix s and without prefix anti

autochthones20
Find what other words can be done using letters: "antichthones"
https://scrabble-word.com/finder/antichthones
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