| oath of allegiance(expression, idiom) | |
| oath of office(expression, idiom) | |
| official oath | |
| ordain | |
| order | |
| sacrament(service, rite) | |
| say so(verb, expression, support, maintain, agree) | |
| substantiate(verb, support, maintain, back, declare) | |
| swear to(verb, expression, support, maintain, back) | |
| swear up and down(verb, expression, idiom, phrasal verb, support) | |
| take a vow(expression, idiom) | |
| test oath | |
| underwrite(verb, agree, declare, approve, uphold) | |
| verify(verb, support, maintain, back, declare) | |
| word of honour(noun, expression, idiom, promise, word) | |
| cross one's heart | |
| accede(verb, agree, declare, commit, undertake) | |
| act as a witness(verb, expression, idiom, support, maintain) | |
| affirmation(noun, support, agreement, claim, contract) | |
| and candle |
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| APA | Smart Define. (2015). vow thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/vow/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "vow thesaurus" https://smartdefine.org/vow/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, vow thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/vow/thesaurus/synonyms>. |
| MLA | Smart Define. "vow thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/vow/thesaurus/synonyms> |