three-seeded mercury vs bush

three-seeded mercury and bush both are nouns.

Word	Noun	Adjective	Verb	Adverb
three-seeded mercury	Yes	No	No	No
bush	Yes	Yes	Yes	No

As nouns, bush is a hypernym of three-seeded mercury; that is, bush is a word with a broader meaning than three-seeded mercury:

Other hypernyms of three-seeded mercury include shrub.

three-seeded mercury (noun)	bush (noun)
weedy herb of eastern North America	hair growing in the pubic area
	dense vegetation consisting of stunted trees or bushes
	a large wilderness area
	a low woody perennial plant usually having several major stems

three-seeded mercury (adjective)	bush (adjective)
	not of the highest quality or sophistication

three-seeded mercury (verb)	bush (verb)
	provide with a bushing