frustrated vs discomfited

frustrated is not a noun while discomfited is a noun.

Word	Noun	Adjective	Verb	Adverb
frustrated	No	Yes	No	No
discomfited	Yes	Yes	No	No

As adjectives, frustrated and discomfited are synonyms defined as:

Other synonyms of frustrated include defeated, disappointed, foiled, thwarted.

frustrated (noun)	discomfited (noun)
	people who are defeated

frustrated (adjective)	discomfited (adjective)
disappointingly unsuccessful	disappointingly unsuccessful