credit line vs bank line

credit line and bank line both are nouns.

Word	Noun	Adjective	Verb	Adverb
credit line	Yes	No	No	No
bank line	Yes	No	No	No

As nouns, credit line and bank line are synonyms defined as:

credit line and bank line: the maximum credit that a customer is allowed

Other synonyms of credit line include line, line of credit, personal credit line, personal line of credit.

credit line (noun)	bank line (noun)
a line giving the name of the writer of a story or article	the maximum credit that a customer is allowed
the maximum credit that a customer is allowed