United States vs Louisiana Purchase

United States and Louisiana Purchase both are nouns.

Word	Noun	Adjective	Verb	Adverb
United States	Yes	No	No	No
Louisiana Purchase	Yes	No	No	No

United States (noun)	Louisiana Purchase (noun)
the executive and legislative and judicial branches of the federal government of the United States	territory in the western United States purchased from France in 1803 for $15 million; extends from the Mississippi River to the Rocky Mountains and from the Gulf of Mexico to Canada
North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776