THESAURUS
befit
advance, advantage, agree with, answer, be bound, be obligated, be obliged, be right, become, befitting, behoove, benefit, beseem, do the trick, fill the bill, fit, forward, go together, not come amiss, owe it to, profit, promote, serve, suit the occasion, work
ROGET THESAURUS
befit
Expedience
VB
be expedient, suit,
befit, suit the time,
befit the time, suit the season,
befit the season, suit the occasion,
befit the occasion, conform.
Agreement
VB
be accordant, agree, accord, harmonize, correspond, tally, respond, meet, suit, fit,
befit, do, adapt itself to, fall in with, chime in with, square with, quadrate with, consort with, comport with, dovetail, assimilate, fit like a glove, fit to a tittle, fit to a T, match, become one, homologate, consent, render accordant, fit, suit, adapt, accommodate, graduate, adjust, dress, regulate, readjust, accord, harmonize, reconcile, fadge, dovetail, square.
Duty
VB
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 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.