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