Dah is valid Scrabble Word

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

Definitions for DAH in dictionary:

Words related to DAH

dahs8
Find what other words can be done using letters: "dah"
https://scrabble-word.com/finder/dah
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