NLRB vs National Labor Relations Board

NLRB and National Labor Relations Board both are nouns.

Word	Noun	Adjective	Verb	Adverb
NLRB	Yes	No	No	No
National Labor Relations Board	Yes	No	No	No

As nouns, NLRB and National Labor Relations Board are synonyms defined as:

NLRB and National Labor Relations Board: an independent agency of the United States government charged with mediating disputes between management and labor unions

NLRB (noun)	National Labor Relations Board (noun)
an independent agency of the United States government charged with mediating disputes between management and labor unions	an independent agency of the United States government charged with mediating disputes between management and labor unions