credit line vs line of credit

credit line and line of credit both are nouns.

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

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

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

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

credit line (noun)	line of credit (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