Step 1: Pick one characteristic about the return it offers:
A debenture pays a pre-decided, fixed rate of interest that must be paid whether the company makes a profit or a loss, unlike an equity dividend.
Step 2: Pick one characteristic about repayment:
A debenture is usually issued for a fixed term and is redeemed (repaid) on or before a specified maturity date, unlike share capital which is generally permanent.
Final Answer:
Any two of: fixed interest regardless of profit, holder is a creditor (not owner), and it is repayable/redeemable on a fixed maturity date.