carving vs scrimshaw

carving and scrimshaw both are nouns.

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

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

carving: a sculpture created by removing material (as wood or ivory or stone) in order to create a desired shape
scrimshaw: a carving (or engraving) on whalebone, whale ivory, walrus tusk, etc., usually by American whalers

Other hyponyms of carving include cinquefoil, glyptic art, glyptography, vermiculation, woodcarving.

carving (noun)	scrimshaw (noun)
creating figures or designs in three dimensions	a carving (or engraving) on whalebone, whale ivory, walrus tusk, etc., usually by American whalers
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