frustrated vs foiled

frustrated and foiled both are adjectives.

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

As adjectives, frustrated and foiled are synonyms defined as:

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

frustrated (adjective)	foiled (adjective)
disappointingly unsuccessful	disappointingly unsuccessful