Upper Peninsula of Michigan vs Upper Peninsula

Upper Peninsula of Michigan and Upper Peninsula both are nouns.

Word	Noun	Adjective	Verb	Adverb
Upper Peninsula of Michigan	Yes	No	No	No
Upper Peninsula	Yes	No	No	No

As nouns, Upper Peninsula of Michigan and Upper Peninsula are synonyms defined as:

Upper Peninsula of Michigan and Upper Peninsula: the peninsula between Lake Superior and Lake Michigan that forms the northwestern part of Michigan

Upper Peninsula of Michigan (noun)	Upper Peninsula (noun)
the peninsula between Lake Superior and Lake Michigan that forms the northwestern part of Michigan	the peninsula between Lake Superior and Lake Michigan that forms the northwestern part of Michigan