strike a chord vs affect

strike a chord is not a noun while affect is a noun.

Word	Noun	Adjective	Verb	Adverb
strike a chord	No	No	Yes	No
affect	Yes	No	Yes	No

As verbs, affect is a hypernym of strike a chord; that is, affect is a word with a broader meaning than strike a chord:

Other hypernyms of strike a chord include impress, move, strike.

strike a chord (noun)	affect (noun)
	the conscious subjective aspect of feeling or emotion

strike a chord (verb)	affect (verb)
create an emotional response	act physically on; have an effect upon
refer to or be relevant or familiar to	have an effect upon
evoke a reaction, response, or emotion	make believe with the intent to deceive
	have an emotional or cognitive impact upon
	connect closely and often incriminatingly