Words that Rhyme with triennial
4 Syllable Words
biennial, centennial, decennial, millennial, perennial, quadrennial
5 Syllable Words
bicentennial
Definitions of triennial
a. Continuing three years; as, triennial parliaments; a triennial reign.
a. Happening, coming about, or appearing once in every three years; as, triennial elections; a triennial catalogue; a triennial visitation.
n. Something which takes place or appears once in three years.