strike dumb vs affect

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

Word	Noun	Adjective	Verb	Adverb
strike dumb	No	No	Yes	No
affect	Yes	No	Yes	No

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

Other hypernyms of strike dumb include impress, move, strike.

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

strike dumb (verb)	affect (verb)
render speechless, as by surprising or shocking	act physically on; have an effect upon
	have an effect upon
	make believe with the intent to deceive
	have an emotional or cognitive impact upon
	connect closely and often incriminatingly