kick back vs bounce

kick back is not a noun while bounce is a noun.

Word	Noun	Adjective	Verb	Adverb
kick back	No	No	Yes	No
bounce	Yes	No	Yes	No

As verbs, bounce is a hypernym of kick back; that is, bounce is a word with a broader meaning than kick back:

Other hypernyms of kick back include bound, rebound, recoil, resile, reverberate, ricochet, spring, take a hop.

kick back (noun)	bounce (noun)
	a light, self-propelled movement upwards or forwards
	the quality of a substance that is able to rebound
	rebounding from an impact (or series of impacts)

kick back (verb)	bounce (verb)
spring back, as from a forceful thrust	eject from the premises
pay a kickback; make an illegal payment	hit something so that it bounces
	spring back; spring away from an impact
	leap suddenly
	move up and down repeatedly
	come back after being refused
	refuse to accept and send back