Usury is the practice of making unethical or immoral monetary loans that unfairly enrich the lender. The term may be used in a moral sense—condemning, taking advantage of others' misfortunes—or in a legal sense, where an interest rate is charged in excess of the maximum rate that is allowed by law. A loan may be considered usurious because of excessive or abusive interest rates or other factors defined by a nation's laws.
as salam alaikum
interest has been defined as "money paid at a particular rate for the use of money lent". It is one type of usury (riba) and it should be avoided.
Another type of usury/riba is an "exchange of the same good by unequal quantities or qualities" that some may still define as a form of interest but technically and according to common view has not been considered as such.
With prayers for your success.