litchi tree vs Litchi chinensis

litchi tree and Litchi chinensis both are nouns.

Word	Noun	Adjective	Verb	Adverb
litchi tree	Yes	No	No	No
Litchi chinensis	Yes	No	No	No

As nouns, litchi tree and Litchi chinensis are synonyms defined as:

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

Other synonyms of litchi tree include lichee, litchi, Nephelium litchi.

litchi tree (noun)	Litchi chinensis (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