carving vs petroglyph

carving and petroglyph both are nouns.

Word	Noun	Adjective	Verb	Adverb
carving	Yes	No	No	No
petroglyph	Yes	No	No	No

As nouns, petroglyph is a hyponym of carving; that is, petroglyph is a word with a more specific, narrower meaning than carving:

carving: removing parts from hard material to create a desired pattern or shape
petroglyph: a carving or line drawing on rock (especially one made by prehistoric people)

Other hyponyms of carving include truncation.

carving (noun)	petroglyph (noun)
creating figures or designs in three dimensions	a carving or line drawing on rock (especially one made by prehistoric people)
removing parts from hard material to create a desired pattern or shape
a sculpture created by removing material (as wood or ivory or stone) in order to create a desired shape