Synonyms and related words :
abjure, abuse, acknowledge, adjure, administer an oath, affirm, agree, allege, and candle, assert, assert under oath, asseverate, assure, attest, aver, avoid, avouch, avow, bear witness, believe in, blaspheme, book, certify, confess, count on, countersign, covenant, curse, curse and swear, cuss, declare, depone, depose, disclose, dysphemize, eschew, execrate, expletive, express the belief, forgo, forsake, forswear, give evidence, give up, go off, guarantee, have confidence in, imprecate, insist, kiss the book, make a promise, oath, pledge, plight, profess, promise, put under oath, put upon oath, rely on, renounce, scatologize, shun, state, swear by, swear by bell, swear in, swear off, swear the truth, swear to, swear to God, swear to goodness, talk dirty, testify, throw over, troth, trust in, undertake, underwrite, use language, vilify, vouch, vouchsafe, vow, warrant, witness