Colorado vs USA

Colorado and USA both are nouns.

Word	Noun	Adjective	Verb	Adverb
Colorado	Yes	No	No	No
USA	Yes	No	No	No

Colorado (noun)	USA (noun)
a state in west central United States in the Rocky Mountains	the army of the United States of America; the agency that organizes and trains soldiers for land warfare
an important river in the southwestern United States; rises in the Rocky Mountains of northern Colorado and flows southwest through Utah into Arizona (where it flows through the Grand Canyon) and then southward through the southern tip of Nevada, then forming the border between California and Arizona and finally into Mexico where it empties into the Gulf of California; the main source of water in the southwestern United States	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
a river in Texas; flows southeast into the Gulf of Mexico