infinite vs unbounded

infinite is a noun but unbounded is not a noun.

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

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

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