Synonyms of vow in English:

vow


See definition of vow

noun

1‘the monks had taken a vow of silence’

SYNONYMS
oath, pledge, promise, bond, covenant, commitment, avowal, profession, sworn statement, affirmation, attestation, assurance, word, word of honour, guarantee
archaic troth
rare asseveration, averment

verb

1‘I vowed to do better’

SYNONYMS
swear, state under oath, swear under oath, swear on the Bible, take an oath, pledge, promise, affirm, avow, undertake, give an undertaking, engage, commit, commit oneself, make a commitment, give one's word, give one's word of honour, give an assurance, guarantee
depose, make a deposition, bind oneself
archaic plight, asseverate