Words That Rhyme With "Semiannually" :
4 syllables:
actually, annually, casually, cranially, factually, gradually, lineally, manually, menially, tactually
5 syllables:
biannually, biennially, bimanually, centennially, colonially, contractually, decennially, millennially, perennially, quadrennially, septennially, sexennially
6 syllables:
bicentennially, ceremonially, counterfactually, interlineally, matrilineally, matrimonially, patrilineally