assaulter vs stoner

assaulter and stoner both are nouns.

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

As nouns, stoner is a hyponym of assaulter; that is, stoner is a word with a more specific, narrower meaning than assaulter:

assaulter: someone who attacks
stoner: an attacker who pelts the victim with stones (especially with intent to kill)

assaulter (noun)	stoner (noun)
someone who attacks	an attacker who pelts the victim with stones (especially with intent to kill)