Octennial
Quadrennial and octennial are semantically related. In some cases you can replace term "Quadrennial" with "Octennial", this words are similar.
Quadrennial
Octennial and quadrennial are semantically related. Sometimes you can replace term "Octennial" with "Quadrennial", this words are similar.
Mutual synonyms
Cite this Source
Quadrennial and Octennial. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/octennial/quadrennial
Octennial & Quadrennial. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/octennial/quadrennial>.
Quadrennial or Octennial. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/octennial/quadrennial.
Google Ngram Viewer shows how "octennial" and "quadrennial" have occurred on timeline