bludgeoner vs attacker

bludgeoner and attacker both are nouns.

Word	Noun	Adjective	Verb	Adverb
bludgeoner	Yes	No	No	No
attacker	Yes	No	No	No

As nouns, attacker is a hypernym of bludgeoner; that is, attacker is a word with a broader meaning than bludgeoner:

Other hypernyms of bludgeoner include aggressor, assailant, assaulter.

bludgeoner (noun)	attacker (noun)
an assailant who uses a bludgeon	someone who attacks