Tighteners is valid Scrabble Word

Is tighteners a scrabble word?
Official Scrabble Players Dictionary YES
Official Tournament and Club Word List YES
Collins Scrabble Words YES
Is tighteners valid Words with Friends?
Words with Friends YES

Definitions for TIGHTENERS in dictionary:

Words related to TIGHTENERS

tighten11

Similar words containing TIGHTENER without suffix s

tightener13
Find what other words can be done using letters: "tighteners"
https://scrabble-word.com/finder/tighteners
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