charge up vs sexual activity

charge up is not a noun while sexual activity is a noun.

Word	Noun	Adjective	Verb	Adverb
charge up	No	No	Yes	No
sexual activity	Yes	No	No	No

charge up (noun)	sexual activity (noun)
	activities associated with sexual intercourse

charge up (verb)	sexual activity (verb)
cause to be agitated, excited, or roused