Nephelium litchi vs litchi tree

Nephelium litchi and litchi tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
Nephelium litchi	Yes	No	No	No
litchi tree	Yes	No	No	No

As nouns, Nephelium litchi and litchi tree are synonyms defined as:

Nephelium litchi and litchi tree: Chinese tree cultivated especially in Philippines and India for its edible fruit; sometimes placed in genus Nephelium

Other synonyms of Nephelium litchi include lichee, litchi, Litchi chinensis.

Nephelium litchi (noun)	litchi tree (noun)
Chinese tree cultivated especially in Philippines and India for its edible fruit; sometimes placed in genus Nephelium	Chinese tree cultivated especially in Philippines and India for its edible fruit; sometimes placed in genus Nephelium