outcrop vs rock outcrop

outcrop and rock outcrop both are nouns.

Word	Noun	Adjective	Verb	Adverb
outcrop	Yes	No	Yes	No
rock outcrop	Yes	No	No	No

As nouns, outcrop and rock outcrop are synonyms defined as:

outcrop and rock outcrop: the part of a rock formation that appears above the surface of the surrounding land

Other synonyms of outcrop include outcropping.

outcrop (noun)	rock outcrop (noun)
the part of a rock formation that appears above the surface of the surrounding land	the part of a rock formation that appears above the surface of the surrounding land

outcrop (verb)	rock outcrop (verb)
appear on the surface, come to the surface on the ground