pine nut vs pignolia

pine nut and pignolia both are nouns.

Word	Noun	Adjective	Verb	Adverb
pine nut	Yes	No	No	No
pignolia	Yes	No	No	No

As nouns, pine nut and pignolia are synonyms defined as:

pine nut and pignolia: edible seed of any of several nut pines especially some pinons of southwestern North America

Other synonyms of pine nut include pinon nut.

pine nut (noun)	pignolia (noun)
edible seed of any of several nut pines especially some pinons of southwestern North America	edible seed of any of several nut pines especially some pinons of southwestern North America