Synonyms of oath in English:

oath


See definition of oath

noun

1‘an oath of allegiance to the king’

SYNONYMS
vow, sworn statement, promise, pledge, avowal, affirmation, attestation, word of honour, word, bond, guarantee, guaranty
archaic troth

2‘he uttered a stream of unrepeatable oaths’

SYNONYMS
swear word, profanity, expletive, four-letter word, dirty word, obscenity, imprecation, curse, malediction, blasphemy
vulgarism, vulgarity
swearing, bad language, foul language, strong language
informal cuss, cuss word