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3
certain(adjective, strong, indisputable)
1
blind(adjective, firm, fast, short)
11 years ago|4.7k views|share |citing 
APASmart Define. (2015). airtight thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/airtight/thesaurus/synonyms
ChicagoSmart Define. 2015. "airtight thesaurus" https://smartdefine.org/airtight/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, airtight thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/airtight/thesaurus/synonyms>.
MLASmart Define. "airtight thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/airtight/thesaurus/synonyms>