facial vs skin care

facial and skin care both are nouns.

Word	Noun	Adjective	Verb	Adverb
facial	Yes	Yes	No	No
skin care	Yes	No	No	No

As nouns, skin care is a hypernym of facial; that is, skin care is a word with a broader meaning than facial:

facial: care for the face that usually involves cleansing and massage and the application of cosmetic creams
skin care: care for the skin

Other hypernyms of facial include beauty treatment, skincare.

facial (noun)	skin care (noun)
care for the face that usually involves cleansing and massage and the application of cosmetic creams	care for the skin
cranial nerve that supplies facial muscles

facial (adjective)	skin care (adjective)
of or concerning the face
of or pertaining to the outside surface of an object