Term: noncallable bond: a bond containing a provision that the holder cannot redeem the security before a specific date (usually at maturity)
Broader: bond: 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 | Unrelated: giant kangaroo: very large greyish-brown Australian kangaroo formerly abundant in open wooded areas