emphasis vs intensity

emphasis and intensity both are nouns.

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

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

Other hypernyms of emphasis include intensiveness.

emphasis (noun)	intensity (noun)
intensity or forcefulness of expression	high level or degree; the property of being intense
the relative prominence of a syllable or musical note (especially with regard to stress or pitch)	chromatic purity: freedom from dilution with white and hence vivid in hue
special and significant stress by means of position or repetition e.g.	the magnitude of sound (usually in a specified direction)
special importance or significance	the amount of energy transmitted (as by acoustic or electromagnetic radiation)