Synonyms|23Antonyms|6|Broader|7Narrower|7Related|121
2
invalidate
1
annul
1
avoid
1
nullify
1
quash
1
void
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APASmart Define. (2013). formalise thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/formalise/thesaurus/antonyms
ChicagoSmart Define. 2013. "formalise thesaurus" https://smartdefine.org/formalise/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2013, formalise thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/formalise/thesaurus/antonyms>.
MLASmart Define. "formalise thesaurus" 28 June 2013. Web. 26 September 2026. <https://smartdefine.org/formalise/thesaurus/antonyms>