- A debenture is a type of debt instrument that is not secured by physical assets.
- Collateral is defined as a property or asset that a borrower offers to the lender as security for repayment of a loan.
- Bond is a signed promise to pay a certain sum of money on a certain date or fulfillment of a specific condition. Bonds may or may not be secured by collateral.
- Indenture is a legal document published by the issuer of a security giving details about the terms and conditions about the agreement.