stretch mark vs banding

stretch mark and banding both are nouns.

Word	Noun	Adjective	Verb	Adverb
stretch mark	Yes	No	No	No
banding	Yes	No	No	No

As nouns, banding is a hypernym of stretch mark; that is, banding is a word with a broader meaning than stretch mark:

stretch mark: a narrow band resulting from tension on the skin (as on abdominal skin after pregnancy)
banding: a stripe or stripes of contrasting color

Other hypernyms of stretch mark include band, stria, striation.

stretch mark (noun)	banding (noun)
a narrow band resulting from tension on the skin (as on abdominal skin after pregnancy)	an adornment consisting of a strip of a contrasting color or material
	a stripe or stripes of contrasting color