unbounded vs infinite

unbounded is not a noun while infinite is a noun.

Word	Noun	Adjective	Verb	Adverb
unbounded	No	Yes	No	No
infinite	Yes	Yes	No	No

unbounded (noun)	infinite (noun)
	the unlimited expanse in which everything is located

unbounded (adjective)	infinite (adjective)
seemingly boundless in amount, number, degree, or especially extent	having no limits or boundaries in time or space or extent or magnitude
	(of verbs) not having tense, person, or number (as a participle or gerund or infinitive)
	total and all-embracing
	too numerous to be counted