Here's what rhymes with multifuctional.
instructional constructional Words that almost rhyme with multifuctional
functional dysfunctional junctional deductible subtotal multiple culpable lovable gullible nonfunctional loveable refundable touchable adjustable ineluctable clubbable inculpable untouchable unlovable nonrefundable uncrushable conductible combustible incombustible noncombustible