vow Synonyms

consecrate solemn word warrant vouch undertake undertaking troth testify swear sware recognizance promise profession warranty word take the stand give an affidavit act as a witness solemn declaration bear testimony make an affidavit swear up and down take an oath word of honour word of honor swear to God oath of office give one's word profess plight pledge betrothal betroth bename avow aver assure assurance asseveration asseverate assert affirm affiance betrothment commit oath oaths insist guaranty guarantee