brink vs bound

brink and bound both are nouns.

Word	Noun	Adjective	Verb	Adverb
brink	Yes	No	No	No
bound	Yes	Yes	Yes	No

As nouns, bound is a hypernym of brink; that is, bound is a word with a broader meaning than brink:

Other hypernyms of brink include boundary, limit.

As nouns, bound is a hypernym of brink; that is, bound is a word with a broader meaning than brink:

Other hypernyms of brink include boundary, edge.

brink (noun)	bound (noun)
the limit beyond which something happens or changes	a light, self-propelled movement upwards or forwards
the edge of a steep place	the greatest possible degree of something
a region marking a boundary	the line or plane indicating the limit or extent of something
	a line determining the limits of an area

brink (adjective)	bound (adjective)
	confined by bonds
	secured with a cover or binding; often used as a combining form
	held with another element, substance or material in chemical or physical union
	confined in the bowels
	headed or intending to head in a certain direction; often used as a combining form as in `college-bound students'
	bound by an oath
	covered or wrapped with a bandage
	bound by contract
	(usually followed by `to') governed by fate

brink (verb)	bound (verb)
	place limits on (extent or amount or access)
	spring back; spring away from an impact
	move forward by leaps and bounds
	form the boundary of; be contiguous to