playground slide vs plaything

playground slide and plaything both are nouns.

Word	Noun	Adjective	Verb	Adverb
playground slide	Yes	No	No	No
plaything	Yes	No	No	No

As nouns, plaything is a hypernym of playground slide; that is, plaything is a word with a broader meaning than playground slide:

playground slide: plaything consisting of a sloping chute down which children can slide
plaything: an artifact designed to be played with

Other hypernyms of playground slide include toy.

playground slide (noun)	plaything (noun)
plaything consisting of a sloping chute down which children can slide	an artifact designed to be played with