tree tobacco vs Nicotiana glauca

tree tobacco and Nicotiana glauca both are nouns.

Word	Noun	Adjective	Verb	Adverb
tree tobacco	Yes	No	No	No
Nicotiana glauca	Yes	No	No	No

As nouns, tree tobacco and Nicotiana glauca are synonyms defined as:

tree tobacco and Nicotiana glauca: evergreen South American shrub naturalized in United States; occasionally responsible for poisoning livestock

Other synonyms of tree tobacco include mustard tree.

tree tobacco (noun)	Nicotiana glauca (noun)
evergreen South American shrub naturalized in United States; occasionally responsible for poisoning livestock	evergreen South American shrub naturalized in United States; occasionally responsible for poisoning livestock