N. duty, what ought to be done, moral obligation, accountableness, liability, onus, responsibility, bounden duty, imperative duty, call, call of duty, accountability, allegiance, fealty, tie engagement, part, function, calling, morality, morals, decalogue, case of conscience, conscientiousness, conscience, inward monitor, still small voice within, sense of duty, tender conscience, superego, the hell within, dueness, propriety, fitness, seemliness, amenability, decorum, τὸ πρέπον, the thing, the proper thing, the right thing to do, the proper thing to do, ethics, ethology, deontology, aretology, moral philosophy, ethical philosophy, casuistry, polity, observance, fulfillment, discharge, performance, acquittal, satisfaction, redemption, good behavior

V. be the duty of, be incumbent, on, be responsible, behoove, become, befit, beseem, belong to, pertain to, fall to one's lot, devolve on, lie upon, lie on one's head, lie at one's door, rest with, rest on the shoulders of, take upon oneself, be bound to, become bound to, be sponsor for, become sponsor for, incur a responsibility, be under an obligation, stand under an obligation, lie under an obligation, have to answer for, owe to it oneself, impose a duty, &c. n, enjoin, require, exact, bind, bind over, saddle with, prescribe, assign, call upon, look to, oblige, enter upon a duty, perform a duty, observe a duty, fulfill a duty, discharge a duty, adhere to a duty, acquit oneself of a duty, satisfy a duty, enter upon an obligation, perform an obligation, observe an obligation, fulfill an obligation, discharge an obligation, adhere to an obligation, acquit oneself of an obligation, satisfy an obligation, act one's part, redeem one's pledge, do justice to, be at one's post, do duty, do one's duty, be on one's good behavior, mind one's p's and q's

Adj. obligatory, binding, imperative, peremptory, stringent, behooving, incumbent on, chargeable on, under obligation, obliged by, bound by, tied by, saddled with, due to, beholden to, bound to, indebted to, tied down, compromised, in duty bound, amenable, liable, accountable, responsible, answerable, right, meet, moral, ethical, casuistical, conscientious, ethological

Adv. with a safe conscience, as in duty, bound, on one's own responsibility, at one's own risk, suo periculo, in foro conscientiae, quamdiu se bene gesserit

Phr. dura lex sed lex, dulce et decorum est pro patria mori, honos habet onus, leve fit quod bene fertur onus, loyaute m'oblige, "simple duty bath no place for fear", "stern daughter of the voice of god", "there is a higher law than the constitution"