absoluteness vs boundary

absoluteness and boundary both are nouns.

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

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

Other hypernyms of absoluteness include bound, limit.

absoluteness (noun)	boundary (noun)
the quality of being absolute	the greatest possible degree of something
the quality of being complete or utter or extreme	the line or plane indicating the limit or extent of something
	a line determining the limits of an area