Rilles
6 lettersnounrareUpdated June 2026
Definition
Plural of rille, small narrow streams or shallow watercourses, or the narrow channels and grooves observed on the surface of the Moon.
“Astronomers photographed dozens of rilles on the lunar surface during the mapping mission.”
Related Words
Word Game Tips
🟩
Wordle
Double L in positions four and five, followed by ES. Contains five distinct letters across six positions.
🔤
Scrabble
Worth 8 points. A useful play when carrying two L tiles, and the -ES ending hooks cleanly onto the board.
Words Related to Rilles
Explore Similar Words
Try These Tools
Dictionary References
Look up rilles in an authoritative dictionary for full definitions, pronunciation, and etymology.
Ready to test your word skills?
Download Word Challenge for unlimited word puzzles, a fresh Daily Challenge, and head-to-head multiplayer. Guess the hidden word in six tries or fewer!