delimitation vs boundary

delimitation and boundary both are nouns.

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

As nouns, boundary is a hypernym of delimitation; that is, boundary is a word with a broader meaning than delimitation:

Other hypernyms of delimitation include bound, bounds.

delimitation (noun)	boundary (noun)
a line that indicates a boundary	the greatest possible degree of something
	the line or plane indicating the limit or extent of something
	a line determining the limits of an area