Star-Spangled Banner vs Old Glory

Star-Spangled Banner and Old Glory both are nouns.

Word	Noun	Adjective	Verb	Adverb
Star-Spangled Banner	Yes	No	No	No
Old Glory	Yes	No	No	No

As nouns, Star-Spangled Banner and Old Glory are synonyms defined as:

Star-Spangled Banner and Old Glory: the national flag of the United States of America

Other synonyms of Star-Spangled Banner include American flag, Stars and Stripes.

Star-Spangled Banner (noun)	Old Glory (noun)
the national flag of the United States of America	the national flag of the United States of America