bull bay vs magnolia

bull bay and magnolia both are nouns.

Word	Noun	Adjective	Verb	Adverb
bull bay	Yes	No	No	No
magnolia	Yes	No	No	No

As nouns, magnolia is a hypernym of bull bay; that is, magnolia is a word with a broader meaning than bull bay:

bull bay: evergreen tree of southern United States having large stiff glossy leaves and huge white sweet-smelling flowers
magnolia: any shrub or tree of the genus Magnolia; valued for their longevity and exquisite fragrant blooms

bull bay (noun)	magnolia (noun)
evergreen tree of southern United States having large stiff glossy leaves and huge white sweet-smelling flowers	any shrub or tree of the genus Magnolia; valued for their longevity and exquisite fragrant blooms
	dried bark of various magnolias; used in folk medicine