rung vs stave

rung and stave both are nouns.

Word	Noun	Adjective	Verb	Adverb
rung	Yes	No	No	No
stave	Yes	No	Yes	No

As nouns, rung and stave are synonyms defined as:

Other synonyms of rung include round.

rung (noun)	stave (noun)
one of the crosspieces that form the steps of a ladder	one of several thin slats of wood forming the sides of a barrel or bucket
a crosspiece between the legs of a chair	a crosspiece between the legs of a chair
	(music) the system of five horizontal lines on which the musical notes are written

rung (verb)	stave (verb)
	burst or force (a hole) into something
	furnish with staves