Uptighter is valid Scrabble Word

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

Definitions for UPTIGHTER in dictionary:

Words related to UPTIGHTER

uptight13

Similar words containing UPTIGHT without suffix er

uptight13 uptightest16 uptightness17 uptightnesses19
Find what other words can be done using letters: "uptighter"
https://scrabble-word.com/finder/uptighter
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