unsuccessful vs unfortunate

unsuccessful is not a noun while unfortunate is a noun.

Word	Noun	Adjective	Verb	Adverb
unsuccessful	No	Yes	No	No
unfortunate	Yes	Yes	No	No

unsuccessful (noun)	unfortunate (noun)
	a person who suffers misfortune

unsuccessful (adjective)	unfortunate (adjective)
not successful; having failed or having an unfavorable outcome	not favored by fortune; marked or accompanied by or resulting in ill fortune
failing to accomplish an intended result	not auspicious; boding ill
	unsuitable or regrettable