sex offense vs sexual assault

sex offense and sexual assault both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex offense	Yes	No	No	No
sexual assault	Yes	No	No	No

As nouns, sex offense and sexual assault are synonyms defined as:

sex offense and sexual assault: a statutory offense that provides that it is a crime to knowingly cause another person to engage in an unwanted sexual act by force or threat

Other synonyms of sex offense include sex crime, sexual abuse.

sex offense (noun)	sexual assault (noun)
a statutory offense that provides that it is a crime to knowingly cause another person to engage in an unwanted sexual act by force or threat	a statutory offense that provides that it is a crime to knowingly cause another person to engage in an unwanted sexual act by force or threat