sexual activity vs assault

sexual activity and assault both are nouns.

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

sexual activity (noun)	assault (noun)
activities associated with sexual intercourse	close fighting during the culmination of a military attack
	a threatened or attempted physical attack by someone who appears to be able to cause bodily harm if not stopped
	the crime of forcing a person to submit to sexual intercourse against his or her will

sexual activity (verb)	assault (verb)
	attack in speech or writing
	attack someone physically or emotionally
	force (someone) to have sex against their will