Synonyms and related words :
adherence, adhesion, affiance, allegiance, assurance, assure, attachment, avouch, avouchment, banns, banns of matrimony, become engaged, betroth, betrothal, betrothing, betrothment, bona fides, bond, bonne foi, constancy, contract, contract an engagement, countersign, devotedness, devotion, engage, engagement, espousal, faith, faithfulness, fealty, fidelity, firmness, good faith, guarantee, handfasting, homage, loyalty, make a promise, marriage contract, oath, parole, pledge, plight, plighted faith, plighted troth, promise, publish the banns, solemn declaration, staunchness, steadfastness, swear, tie, true blue, trueness, underwrite, vouch, vow, warrant, warranty, word, word of honor