pogo stick vs plaything

pogo stick and plaything both are nouns.

Word	Noun	Adjective	Verb	Adverb
pogo stick	Yes	No	No	No
plaything	Yes	No	No	No

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

pogo stick: plaything consisting of a pole with foot rests and a strong spring; propelled by jumping
plaything: an artifact designed to be played with

Other hypernyms of pogo stick include toy.

pogo stick (noun)	plaything (noun)
plaything consisting of a pole with foot rests and a strong spring; propelled by jumping	an artifact designed to be played with