stone drill vs rock drill

stone drill and rock drill both are nouns.

Word	Noun	Adjective	Verb	Adverb
stone drill	Yes	No	No	No
rock drill	Yes	No	No	No

As nouns, stone drill and rock drill are synonyms defined as:

Other synonyms of stone drill include bore bit, borer.

stone drill (noun)	rock drill (noun)
a drill for penetrating rock	a drill for penetrating rock