energise vs sexual activity

energise is not a noun while sexual activity is a noun.

Word	Noun	Adjective	Verb	Adverb
energise	No	No	Yes	No
sexual activity	Yes	No	No	No

energise (noun)	sexual activity (noun)
	activities associated with sexual intercourse

energise (verb)	sexual activity (verb)
cause to be alert and energetic
raise to a higher energy level