Slabstone is valid Scrabble Word

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

Definitions for SLABSTONE in dictionary:

Words related to SLABSTONE

flagstone13 slabstones12

Words that contain SLABSTONE

slabstones12
Find what other words can be done using letters: "slabstone"
https://scrabble-word.com/finder/slabstone
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