face card vs picture card

face card and picture card both are nouns.

Word	Noun	Adjective	Verb	Adverb
face card	Yes	No	No	No
picture card	Yes	No	No	No

As nouns, face card and picture card are synonyms defined as:

face card and picture card: one of the twelve cards in a deck bearing a picture of a face

Other synonyms of face card include court card.

face card (noun)	picture card (noun)
one of the twelve cards in a deck bearing a picture of a face	one of the twelve cards in a deck bearing a picture of a face