tilting board vs plaything

tilting board and plaything both are nouns.

Word	Noun	Adjective	Verb	Adverb
tilting board	Yes	No	No	No
plaything	Yes	No	No	No

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

tilting board: a plaything consisting of a board balanced on a fulcrum; the board is ridden up and down by children at either end
plaything: an artifact designed to be played with

Other hypernyms of tilting board include toy.

tilting board (noun)	plaything (noun)
a plaything consisting of a board balanced on a fulcrum; the board is ridden up and down by children at either end	an artifact designed to be played with