RAF vs Royal Air Force

RAF and Royal Air Force both are nouns.

Word	Noun	Adjective	Verb	Adverb
RAF	Yes	No	No	No
Royal Air Force	Yes	No	No	No

As nouns, RAF and Royal Air Force are synonyms defined as:

RAF (noun)	Royal Air Force (noun)
the airforce of Great Britain	the airforce of Great Britain
a Marxist and Maoist terrorist organization in Germany; a network of underground guerillas who committed acts of violence in the service of the class struggle; a successor to the Baader-Meinhof Gang; became one of Europe's most feared terrorist groups; disbanded in 1998