We don't have synonyms for rills yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are bills, rille and drills.
(n) :
A very small brook; a streamlet; a creek, rivulet.
(v) :
To trickle, pour, or run like a small stream.
(n) :
(planetology) Alternative form of rille. [(planetology) A long, narrow depression that resembles a channel, found on the surface of various lunar and planetary bodies.]
(n) :
A very small brook; a streamlet; a creek, rivulet.
(v) :
To trickle, pour, or run like a small stream.
(n) :
(planetology) Alternative form of rille. [(planetology) A long, narrow depression that resembles a channel, found on the surface of various lunar and planetary bodies.]