Synonyms of oath

1 Syllable
word, vow, bond, curst
2 Syllables
curse, swearword, contract, pledging, vowing, pledge
3 Syllables
guarantee, promise, betrothment, profession, sacrament, no-no's, affiance, avowal, malison
4 Syllables
affirmation, assurance, declarations, affirmations, affidavit, expletive, engagement, adjuration, deposition, testimony, declaration, malediction