Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun rill

2 senses of rill

Sense 1
rivulet, rill, run, runnel, streamlet -- (a small stream)
       => stream, watercourse -- (a natural body of running water flowing on or under the earth)

Sense 2
rill -- (a small channel (as one formed by soil erosion))
       => channel -- (a deep and relatively narrow body of water (as in a river or a harbor or a strait linking two larger bodies) that allows the best passage for vessels; "the ship went aground in the channel")