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