[{"Bold_text": "noun", "List Items": ["the period of time required to recoup a capital investment.", "the return on an investment:This fund yields a payback of 15 percent tax-free.", "the act or fact of paying back; repayment.", "something done in retaliation:Excluding them from her wedding was a vicious payback for years of being snubbed."]}, {"Bold_text": "verb phrase", "List Items": ["to repay or return; pay off pay off:Graduates from this program are successfully paying back their student loans.to retaliate against or punish:She paid us back by refusing the invitation.to requite.", "to repay or return; pay off pay off:Graduates from this program are successfully paying back their student loans.", "to retaliate against or punish:She paid us back by refusing the invitation.", "to requite."]}]