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