cucumber tree vs magnolia

cucumber tree and magnolia both are nouns.

Word	Noun	Adjective	Verb	Adverb
cucumber tree	Yes	No	No	No
magnolia	Yes	No	No	No

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

cucumber tree: American deciduous magnolia having large leaves and fruit like a small cucumber
magnolia: any shrub or tree of the genus Magnolia; valued for their longevity and exquisite fragrant blooms

cucumber tree (noun)	magnolia (noun)
American deciduous magnolia having large leaves and fruit like a small cucumber	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