playing card vs crib

playing card and crib both are nouns.

Word	Noun	Adjective	Verb	Adverb
playing card	Yes	No	No	No
crib	Yes	No	Yes	No

As nouns, crib is a hyponym of playing card; that is, crib is a word with a more specific, narrower meaning than playing card:

playing card (noun)	crib (noun)
one of a pack of cards that are used to play card games	a card game (usually for two players) in which each player is dealt six cards and discards one or two
	the cards discarded by players at cribbage
	baby bed with high sides made of slats
	a bin or granary for storing grains
	a literal translation used in studying a foreign language (often used illicitly)

playing card (verb)	crib (verb)
	line with beams or planks
	take unauthorized (intellectual material)
	use a crib, as in an exam