forcefulness vs intensity

forcefulness and intensity both are nouns.

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

As nouns, intensity is a hypernym of forcefulness; that is, intensity is a word with a broader meaning than forcefulness:

Other hypernyms of forcefulness include intensiveness.

forcefulness (noun)	intensity (noun)
physical energy or intensity	high level or degree; the property of being intense
	chromatic purity: freedom from dilution with white and hence vivid in hue
	the magnitude of sound (usually in a specified direction)
	the amount of energy transmitted (as by acoustic or electromagnetic radiation)