limitlessness vs unboundedness

limitlessness and unboundedness both are nouns.

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

As nouns, limitlessness and unboundedness are synonyms defined as:

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

Other synonyms of limitlessness include boundlessness, infiniteness, infinitude.

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