Words That Rhyme With "Sesquicentennially" :

4 syllables:

cranially, enviously, lineally, menially, plenteously

5 syllables:

biennially, centennially, colonially, compendiously, decennially, millennially, perennially, quadrennially, septennially, sexennially

6 syllables:

bicentennially, ceremonially, interlineally, matrilineally, matrimonially, patrilineally, semiannually