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