pistachio vs Pistacia vera

pistachio and Pistacia vera both are nouns.

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

As nouns, pistachio and Pistacia vera are synonyms defined as:

pistachio and Pistacia vera: small tree of southern Europe and Asia Minor bearing small hard-shelled nuts

Other synonyms of pistachio include pistachio tree.

pistachio (noun)	Pistacia vera (noun)
nut of Mediterranean trees having an edible green kernel	small tree of southern Europe and Asia Minor bearing small hard-shelled nuts
small tree of southern Europe and Asia Minor bearing small hard-shelled nuts