aggravation vs intensification

aggravation and intensification both are nouns.

Word	Noun	Adjective	Verb	Adverb
aggravation	Yes	No	No	No
intensification	Yes	No	No	No

As nouns, intensification is a hypernym of aggravation; that is, intensification is a word with a broader meaning than aggravation:

aggravation: action that makes a problem or a disease (or its symptoms) worse
intensification: action that makes something stronger or more extreme

aggravation (noun)	intensification (noun)
unfriendly behavior that causes anger or resentment	action that makes something stronger or more extreme
action that makes a problem or a disease (or its symptoms) worse	the act of increasing the contrast of (a photographic film)
an exasperated feeling of annoyance