Simplify the following text for a Grade 5 native English-speaking person.
Original: Outside of law , the term rape ( `` an assault by a person involving sexual intercourse with another person without that person 's consent '' ) is often used interchangeably with sexual assault , a closely related ( but in most jurisdictions technically distinct ) form of assault typically including rape and other forms of non-consensual sexual activity .
Simplified: Rape is one form of sexual assault , but not the only one .