crone vs old woman

crone and old woman both are nouns.

Word	Noun	Adjective	Verb	Adverb
crone	Yes	No	No	No
old woman	Yes	No	No	No

As nouns, old woman is a hypernym of crone; that is, old woman is a word with a broader meaning than crone:

crone (noun)	old woman (noun)
an ugly evil-looking old woman	a woman who is old
	herb with greyish leaves found along the east coast of North America; used as an ornamental plant