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