sex activity vs irritation

sex activity and irritation both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex activity	Yes	No	No	No
irritation	Yes	No	No	No

sex activity (noun)	irritation (noun)
activities associated with sexual intercourse	unfriendly behavior that causes anger or resentment
	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