Tightenings is valid Scrabble Word

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

Definitions for TIGHTENINGS in dictionary:

Words related to TIGHTENINGS

tightening15

Similar words containing TIGHTENING without suffix s

tightening15 retightening17 overtightening22
Find what other words can be done using letters: "tightenings"
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