forcefulness vs impulse

forcefulness and impulse both are nouns.

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

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

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

forcefulness (noun)	impulse (noun)
physical energy or intensity	the act of applying force suddenly
	an impelling force or strength
	the electrical discharge that travels along a nerve fiber
	(electronics) a sharp transient wave in the normal electrical state (or a series of such transients)
	a sudden desire
	an instinctive motive