U. S. Army Special Forces vs US Army

U. S. Army Special Forces and US Army both are nouns.

Word	Noun	Adjective	Verb	Adverb
U. S. Army Special Forces	Yes	No	No	No
US Army	Yes	No	No	No

U. S. Army Special Forces (noun)	US Army (noun)
a division of the United States Army that is specially trained for guerilla fighting	the army of the United States of America; the agency that organizes and trains soldiers for land warfare