tupelo tree vs tupelo

tupelo tree and tupelo both are nouns.

Word	Noun	Adjective	Verb	Adverb
tupelo tree	Yes	No	No	No
tupelo	Yes	No	No	No

As nouns, tupelo tree and tupelo are synonyms defined as:

tupelo tree and tupelo: any of several gum trees of swampy areas of North America

tupelo tree (noun)	tupelo (noun)
any of several gum trees of swampy areas of North America	any of several gum trees of swampy areas of North America
	pale soft wood of a tupelo tree especially the water gum