forcefulness vs brunt

forcefulness and brunt both are nouns.

Word	Noun	Adjective	Verb	Adverb
forcefulness	Yes	No	No	No
brunt	Yes	No	No	No

As nouns, brunt is a hyponym of forcefulness; that is, brunt is a word with a more specific, narrower meaning than forcefulness:

Other hyponyms of forcefulness include impulse, momentum, energy, vigor, vigour, zip.

forcefulness (noun)	brunt (noun)
physical energy or intensity	main force of a blow etc