bound off vs spring

bound off is not a noun while spring is a noun.

Word	Noun	Adjective	Verb	Adverb
bound off	No	No	Yes	No
spring	Yes	No	Yes	No

As verbs, spring is a hypernym of bound off; that is, spring is a word with a broader meaning than bound off:

Other hypernyms of bound off include bounce, bound, rebound, recoil, resile, reverberate, ricochet, take a hop.

bound off (noun)	spring (noun)
	a light, self-propelled movement upwards or forwards
	a metal elastic device that returns to its shape or position when pushed or pulled or pressed
	the elasticity of something that can be stretched and returns to its original length
	a point at which water issues forth
	a natural flow of ground water
	the season of growth; spring; the beginning of spring

bound off (verb)	spring (verb)
bound off one point after another	develop suddenly
	produce or disclose suddenly or unexpectedly
	spring back; spring away from an impact
	move forward by leaps and bounds
	develop into a distinctive entity