irritation vs pathology

irritation and pathology both are nouns.

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

irritation (noun)	pathology (noun)
unfriendly behavior that causes anger or resentment	the branch of medical science that studies the causes and nature and effects of diseases
the act of troubling or annoying someone	any deviation from a healthy or normal condition
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