attacker vs wildcat

attacker and wildcat both are nouns.

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

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

attacker (noun)	wildcat (noun)
someone who attacks	any small or medium-sized cat resembling the domestic cat and living in the wild
	an exploratory oil well drilled in land not known to be an oil field
	a cruelly rapacious person

attacker (adjective)	wildcat (adjective)
	(of a mine or oil well) drilled speculatively in an area not known to be productive
	without official authorization
	outside the bounds of legitimate or ethical business practices