Piemonte vs Piedmont

Piemonte and Piedmont both are nouns.

Word	Noun	Adjective	Verb	Adverb
Piemonte	Yes	No	No	No
Piedmont	Yes	No	No	No

As nouns, Piemonte and Piedmont are synonyms defined as:

Piemonte and Piedmont: the region of northwestern Italy; includes the Po valley

Piemonte (noun)	Piedmont (noun)
the region of northwestern Italy; includes the Po valley	the region of northwestern Italy; includes the Po valley
	the plateau between the coastal plain and the Appalachian Mountains: parts of Virginia and North and South Carolina and Georgia and Alabama