Japanese tree lilac vs Syringa reticulata

Japanese tree lilac and Syringa reticulata both are nouns.

Word	Noun	Adjective	Verb	Adverb
Japanese tree lilac	Yes	No	No	No
Syringa reticulata	Yes	No	No	No

As nouns, Japanese tree lilac and Syringa reticulata are synonyms defined as:

Japanese tree lilac and Syringa reticulata: small tree of Japan having narrow pointed leaves and creamy-white flowers

Other synonyms of Japanese tree lilac include Syringa amurensis japonica.

Japanese tree lilac (noun)	Syringa reticulata (noun)
small tree of Japan having narrow pointed leaves and creamy-white flowers	small tree of Japan having narrow pointed leaves and creamy-white flowers