General:
* Credit: (noun) Trustworthiness, reputation, belief; financial arrangement allowing goods/services to be purchased on deferred payment.
* Creditor: (noun) A person or entity to whom money is owed.
* Debtor: (noun) A person or entity who owes money.
* Creditworthy: (adjective) Financially sound and reliable.
* Credibility: (noun) The quality of being believable or trustworthy.
* Credible: (adjective) Believable, trustworthy.
* Accreditation: (noun) Official authorization or approval, often granted to educational institutions or programs.
Financial:
* Credit card: (noun) A card that allows the holder to purchase goods and services on credit.
* Credit line: (noun) The maximum amount of credit a person or entity is allowed to borrow.
* Credit rating: (noun) A numerical evaluation of a person's or entity's creditworthiness.
* Credit report: (noun) A detailed record of a person's credit history.
* Credit score: (noun) A three-digit number representing a person's creditworthiness.
* Credit union: (noun) A financial cooperative owned and controlled by its members.
Other:
* Credence: (noun) Belief, trust, or acceptance.
* Incredible: (adjective) Unbelievable, amazing.
* Discredit: (verb) To damage someone's reputation or cause them to be doubted.
* Accredit: (verb) To officially recognize or approve.
Less common:
* Credulous: (adjective) Easily persuaded to believe something, especially without sufficient evidence.
* Credulity: (noun) The quality of being easily persuaded to believe something.
This is not an exhaustive list, but it gives you a good starting point for exploring words related to "credit".