Subterrestrials is valid Scrabble Word

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

Definitions for SUBTERRESTRIALS in dictionary:

Words related to SUBTERRESTRIALS

subterrestrial16
Find what other words can be done using letters: "subterrestrials"
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