wear out vs bust

wear out is not a noun while bust is a noun.

Word	Noun	Adjective	Verb	Adverb
wear out	No	No	Yes	No
bust	Yes	Yes	Yes	No

As verbs, wear out and bust are synonyms defined as:

Other synonyms of wear out include break, fall apart, wear.

wear out (noun)	bust (noun)
	an occasion for excessive eating or drinking
	a sculpture of the head and shoulders of a person
	the chest of a woman
	a complete failure

wear out (adjective)	bust (adjective)
	lacking funds

wear out (verb)	bust (verb)
exhaust or get tired through overuse or great strain or stress	break open or apart suddenly and forcefully
deteriorate through use or stress	go to pieces
go to pieces	ruin completely
	separate or cause to separate abruptly
	search without warning, make a sudden surprise attack on