North Platte vs Colorado

North Platte and Colorado both are nouns.

Word	Noun	Adjective	Verb	Adverb
North Platte	Yes	No	No	No
Colorado	Yes	No	No	No

North Platte (noun)	Colorado (noun)
a town in west central Nebraska on the Platte River	a state in west central United States in the Rocky Mountains
a river that rises in northern Colorado and flows northward into Wyoming and then eastward and southeastward through Nebraska where it joins the South Platte to form the Platte River	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
	a river in Texas; flows southeast into the Gulf of Mexico