Bittering is valid Scrabble Word

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

Definitions for BITTERING in dictionary:

Words related to BITTERING

bitter8 bittered11 bitters9
Find what other words can be done using letters: "bittering"
https://scrabble-word.com/finder/bittering
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