affright vs fearfulness

affright and fearfulness both are nouns.

Word	Noun	Adjective	Verb	Adverb
affright	Yes	No	Yes	No
fearfulness	Yes	No	No	No

As nouns, fearfulness is a hypernym of affright; that is, fearfulness is a word with a broader meaning than affright:

affright: an overwhelming feeling of fear and anxiety
fearfulness: an emotion experienced in anticipation of some specific pain or danger (usually accompanied by a desire to flee or fight)

Other hypernyms of affright include fear, fright.

affright (noun)	fearfulness (noun)
an overwhelming feeling of fear and anxiety	the trait of being afraid
	an emotion experienced in anticipation of some specific pain or danger (usually accompanied by a desire to flee or fight)

affright (verb)	fearfulness (verb)
cause fear in