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