streamlet vs rill

streamlet and rill both are nouns.

Word	Noun	Adjective	Verb	Adverb
streamlet	Yes	No	No	No
rill	Yes	No	No	No

As nouns, streamlet and rill are synonyms defined as:

Other synonyms of streamlet include rivulet, run, runnel.

streamlet (noun)	rill (noun)
a small stream	a small stream
	a small channel (as one formed by soil erosion)