What is another word for "obligation"?

Roget's Thesaurus (1911) lists these synonyms for "obligation": abide, account, acknowledge, acknowledgment, acquiescence, acquit, acquittal, acquittance, act, adhere, adhesion, after, agreement, and, answer, answerable, arrear, bad, bail, before, beholden, benediction, bill, bind, bless, borrow, borrower, capital, carry, casus, charge, chargeable, check, cling, come, compliance, comply, concurrence, condition, conditional.