5 entries under adjective topic. ×

13
quadruple(noun, quadruplication)
11
fourfold
8
quadruplex
2
four-fold
1
four
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APASmart Define. (2015). quadruplicate thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/quadruplicate/thesaurus/synonyms
ChicagoSmart Define. 2015. "quadruplicate thesaurus" https://smartdefine.org/quadruplicate/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, quadruplicate thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/quadruplicate/thesaurus/synonyms>.
MLASmart Define. "quadruplicate thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/quadruplicate/thesaurus/synonyms>