unboundedness vs boundlessness

unboundedness and boundlessness both are nouns.

Word	Noun	Adjective	Verb	Adverb
unboundedness	Yes	No	No	No
boundlessness	Yes	No	No	No

As nouns, unboundedness and boundlessness are synonyms defined as:

unboundedness and boundlessness: the quality of being infinite; without bound or limit

Other synonyms of unboundedness include infiniteness, infinitude, limitlessness.

unboundedness (noun)	boundlessness (noun)
the quality of being infinite; without bound or limit	the quality of being infinite; without bound or limit