President Lyndon Johnson vs LBJ

President Lyndon Johnson and LBJ both are nouns.

Word	Noun	Adjective	Verb	Adverb
President Lyndon Johnson	Yes	No	No	No
LBJ	Yes	No	No	No

As nouns, President Lyndon Johnson and LBJ are synonyms defined as:

President Lyndon Johnson and LBJ: 36th President of the United States; was elected vice president and succeeded Kennedy when Kennedy was assassinated (1908-1973)

Other synonyms of President Lyndon Johnson include Johnson, Lyndon B. Johnson, Lyndon Baines Johnson, Lyndon Johnson, President Johnson.

President Lyndon Johnson (noun)	LBJ (noun)
36th President of the United States; was elected vice president and succeeded Kennedy when Kennedy was assassinated (1908-1973)	36th President of the United States; was elected vice president and succeeded Kennedy when Kennedy was assassinated (1908-1973)