sadden vs affect

sadden is not a noun while affect is a noun.

Word	Noun	Adjective	Verb	Adverb
sadden	No	No	Yes	No
affect	Yes	No	Yes	No

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

Other hypernyms of sadden include impress, move, strike.

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

sadden (verb)	affect (verb)
come to feel sad	act physically on; have an effect upon
make unhappy	have an effect upon
	make believe with the intent to deceive
	have an emotional or cognitive impact upon
	connect closely and often incriminatingly