Mickey Finn vs knockout drops

Mickey Finn and knockout drops both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mickey Finn	Yes	No	No	No
knockout drops	Yes	No	No	No

As nouns, knockout drops is a hypernym of Mickey Finn; that is, knockout drops is a word with a broader meaning than Mickey Finn:

Mickey Finn: slang term for knockout drops
knockout drops: chloral hydrate in combination with alcohol; usually administered surreptitiously to make the drinker unconscious

Mickey Finn (noun)	knockout drops (noun)
slang term for knockout drops	chloral hydrate in combination with alcohol; usually administered surreptitiously to make the drinker unconscious