Is “Rille” a Scrabble word?
Yes
RILLE
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 Rille
noun
1.A long, narrow depression that resembles a channel, found on the surface of various lunar and planetary bodies.
Synonyms: rima