southern buckthorn vs Bumelia lycioides

southern buckthorn and Bumelia lycioides both are nouns.

Word	Noun	Adjective	Verb	Adverb
southern buckthorn	Yes	No	No	No
Bumelia lycioides	Yes	No	No	No

As nouns, southern buckthorn and Bumelia lycioides are synonyms defined as:

southern buckthorn and Bumelia lycioides: shrubby thorny deciduous tree of southeastern United States with white flowers and small black drupaceous fruit

Other synonyms of southern buckthorn include mock orange, shittim, shittimwood.

southern buckthorn (noun)	Bumelia lycioides (noun)
shrubby thorny deciduous tree of southeastern United States with white flowers and small black drupaceous fruit	shrubby thorny deciduous tree of southeastern United States with white flowers and small black drupaceous fruit