pistachio vs Pistacia

pistachio and Pistacia both are nouns.

Word	Noun	Adjective	Verb	Adverb
pistachio	Yes	No	No	No
Pistacia	Yes	No	No	No

pistachio (noun)	Pistacia (noun)
nut of Mediterranean trees having an edible green kernel	a dicotyledonous genus of trees of the family Anacardiaceae having drupaceous fruit
small tree of southern Europe and Asia Minor bearing small hard-shelled nuts