lapidator vs aggressor

lapidator and aggressor both are nouns.

Word	Noun	Adjective	Verb	Adverb
lapidator	Yes	No	No	No
aggressor	Yes	No	No	No

As nouns, aggressor is a hypernym of lapidator; that is, aggressor is a word with a broader meaning than lapidator:

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

Other hypernyms of lapidator include assailant, assaulter, attacker.

lapidator (noun)	aggressor (noun)
an attacker who pelts the victim with stones (especially with intent to kill)	someone who attacks
	a confident assertive person who acts as instigator