USA vs armed forces

USA and armed forces both are nouns.

Word	Noun	Adjective	Verb	Adverb
USA	Yes	No	No	No
armed forces	Yes	No	No	No

USA (noun)	armed forces (noun)
the army of the United States of America; the agency that organizes and trains soldiers for land warfare	the military forces of a nation
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