spade vs playing card

spade and playing card both are nouns.

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

As nouns, playing card is a hypernym of spade; that is, playing card is a word with a broader meaning than spade:

spade: a playing card in the major suit that has one or more black figures on it
playing card: one of a pack of cards that are used to play card games

spade (noun)	playing card (noun)
a sturdy hand shovel that can be pushed into the earth with the foot	one of a pack of cards that are used to play card games
a playing card in the major suit that has one or more black figures on it

spade (verb)	playing card (verb)
dig (up) with a spade