Bond certificate and Debt instrument

Bond certificate noun - A certificate of debt (usually interest-bearing or discounted) that is issued by a government or corporation in order to raise money; the issuer is required to pay a fixed sum annually until maturity and then a fixed sum to repay the principal.

Debt instrument and bond certificate are semantically related. In some cases you can use "Debt instrument" instead a noun phrase "Bond certificate".

Debt instrument noun - A written promise to repay a debt.

Bond certificate and debt instrument are semantically related. Sometimes you can replace phrase "Bond certificate" with "Debt instrument", this phrases are similar.