Is “Ashlar” a Scrabble word?
Yes
ASHLAR
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Ashlar
/ˈæʃlə/
noun
1.A large cuboid stone; masonry making use of such stone blocks.
2.A hurling stone used in warfare.