assault vs assaulter

assault and assaulter both are nouns.

Word	Noun	Adjective	Verb	Adverb
assault	Yes	No	Yes	No
assaulter	Yes	No	No	No

assault (noun)	assaulter (noun)
close fighting during the culmination of a military attack	someone who attacks
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

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