Pistacia vera vs pistachio

Pistacia vera and pistachio both are nouns.

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

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

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

Other synonyms of Pistacia vera include pistachio tree.

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