Is “Rias” a Scrabble word?
Yes
RIAS
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 Rias
noun
1.A submergent coastal landform, often known as a drowned river valley