irritation vs annoyance

irritation and annoyance both are nouns.

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

As nouns, irritation and annoyance are synonyms defined as:

Other synonyms of irritation include annoying, vexation.

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

Other hypernyms of irritation include chafe, vexation.

As nouns, irritation and annoyance are synonyms defined as:

irritation and annoyance: the psychological state of being irritated or annoyed

Other synonyms of irritation include botheration, vexation.

irritation (noun)	annoyance (noun)
unfriendly behavior that causes anger or resentment	the act of troubling or annoying someone
the act of troubling or annoying someone	something or someone that causes trouble; a source of unhappiness
an uncomfortable feeling of mental painfulness or distress	anger produced by some annoying irritation
a sudden outburst of anger	an unpleasant person who is annoying or exasperating
the psychological state of being irritated or annoyed	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