We don't have synonyms for national bank yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are national park, national banks and national brand.
(N) :
In the United States, a national bank is an ordinary private bank operating within the federal government's regulatory structure, which usually but not always operates in multiple U.S. states, and is under the supervision of the Office of the Comptroller of the Currency.
(N) :
In the United States, a national bank is an ordinary private bank operating within the federal government's regulatory structure, which usually but not always operates in multiple U.S. states, and is under the supervision of the Office of the Comptroller of the Currency.