intensity vs emphasis

intensity and emphasis both are nouns.

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

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

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