Celtis occidentalis vs American hackberry

Celtis occidentalis and American hackberry both are nouns.

Word	Noun	Adjective	Verb	Adverb
Celtis occidentalis	Yes	No	No	No
American hackberry	Yes	No	No	No

As nouns, Celtis occidentalis and American hackberry are synonyms defined as:

Celtis occidentalis and American hackberry: large deciduous shade tree of southern United States with small deep purple berries

Celtis occidentalis (noun)	American hackberry (noun)
large deciduous shade tree of southern United States with small deep purple berries	large deciduous shade tree of southern United States with small deep purple berries