WordNet (r) 3.0 (2006):

credit rating
    n 1: an estimate, based on previous dealings, of a person's or
         an organization's ability to fulfill their financial
         commitments [syn: credit rating, credit]

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "credit rating":
   bank credit, book credit, borrowing power, cash credit,
   commercial credit, consumer credit, credit, credit insurance,
   credit union, financial condition, hire purchase plan,
   installment credit, installment plan, investment credit,
   line of credit, never-never, rating, tax credit, tick, trust