circumference vs delimitation

circumference and delimitation both are nouns.

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

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

Other hypernyms of circumference include border, borderline, boundary line, mete.

circumference (noun)	delimitation (noun)
the size of something as given by the distance around it	a line that indicates a boundary
the length of the closed curve of a circle
the boundary line encompassing an area or object