spoke vs crosspiece

spoke and crosspiece both are nouns.

Word	Noun	Adjective	Verb	Adverb
spoke	Yes	No	No	No
crosspiece	Yes	No	No	No

As nouns, crosspiece is a hypernym of spoke; that is, crosspiece is a word with a broader meaning than spoke:

spoke (noun)	crosspiece (noun)
support consisting of a radial member of a wheel joining the hub to the rim	a transverse brace
one of the crosspieces that form the steps of a ladder	a horizontal beam that extends across something