bound vs boundary

bound and boundary both are nouns.

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

As nouns, bound and boundary are synonyms defined as:

Other synonyms of bound include limit.

As nouns, bound and boundary are synonyms defined as:

bound and boundary: the line or plane indicating the limit or extent of something

Other synonyms of bound include bounds.

As nouns, bound and boundary are synonyms defined as:

Other synonyms of bound include edge.

bound (noun)	boundary (noun)
a light, self-propelled movement upwards or forwards	the greatest possible degree of something
the greatest possible degree of something	the line or plane indicating the limit or extent of something
the line or plane indicating the limit or extent of something	a line determining the limits of an area
a line determining the limits of an area

bound (adjective)	boundary (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

bound (verb)	boundary (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