exasperation vs irritation

exasperation and irritation both are nouns.

Word	Noun	Adjective	Verb	Adverb
exasperation	Yes	No	No	No
irritation	Yes	No	No	No

As nouns, irritation is a hypernym of exasperation; that is, irritation is a word with a broader meaning than exasperation:

Other hypernyms of exasperation include annoyance, annoying, vexation.

exasperation (noun)	irritation (noun)
actions that cause great irritation (or even anger)	unfriendly behavior that causes anger or resentment
an exasperated feeling of annoyance	the act of troubling or annoying someone
	an uncomfortable feeling of mental painfulness or distress
	a sudden outburst of anger
	the psychological state of being irritated or annoyed
	the neural or electrical arousal of an organ or muscle or gland
	(pathology) abnormal sensitivity to stimulation