intense vs intensity

intense is not a noun while intensity is a noun.

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

intense (noun)	intensity (noun)
	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)

intense (adjective)	intensity (adjective)
possessing or displaying a distinctive feature to a heightened degree
(of color) having the highest saturation
extremely sharp or severe