irritation vs aggro

irritation and aggro both are nouns.

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

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

Other hyponyms of irritation include last straw, taunt, taunting, twit.

irritation (noun)	aggro (noun)
unfriendly behavior that causes anger or resentment	(informal British usage) aggravation or aggression
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