buckwheat tree vs Cliftonia monophylla

buckwheat tree and Cliftonia monophylla both are nouns.

Word	Noun	Adjective	Verb	Adverb
buckwheat tree	Yes	No	No	No
Cliftonia monophylla	Yes	No	No	No

As nouns, buckwheat tree and Cliftonia monophylla are synonyms defined as:

buckwheat tree and Cliftonia monophylla: tree of low-lying coastal areas of southeastern United States having glossy leaves and racemes of fragrant white flowers

Other synonyms of buckwheat tree include titi.

buckwheat tree (noun)	Cliftonia monophylla (noun)
tree of low-lying coastal areas of southeastern United States having glossy leaves and racemes of fragrant white flowers	tree of low-lying coastal areas of southeastern United States having glossy leaves and racemes of fragrant white flowers