stoner vs assaulter

stoner and assaulter both are nouns.

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

As nouns, assaulter is a hypernym of stoner; that is, assaulter is a word with a broader meaning than stoner:

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

Other hypernyms of stoner include aggressor, assailant, attacker.

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