What rhymes with proportional

aberrational, adaptational, affectional, antiphonal, antirational, appositional, archidiaconal, associational, attritional, binational, cantonal, coalitional, collisional, communicational, complexional, computational, conceptional, conformational, conjugational, conjunctional, conservational, constructional, convectional, convocational, correctional, correlational, denotational, depositional, directional, discretional, disquisitional, distortional, divisional, doctrinal, dysfunctional, erosional, exceptional, expositional, fictional, formational, fractional, frictional, generational, gestational, gradational, gravitational, hallucinational, ideational, illusional, illustrational, implicational, inflectional, innovational, inquisitional, instructional, interjectional, interrogational, irrigational, junctional, jurisdictional, juxtapositional, lactational, locational, matrilocal, motivational, multidirectional, nonconventional, nonfictional, nonfunctional, nonoperational, nonprofessional, nonpunishable, nonvocational, notational, notional, oblational, observational, occasional, occasionalism, omnidirectional, optional, organizational, perceptional, permutational, prepositional, presentational, probational, proportional, radiational, reconstructional, recreational, reflectional, reformational, refractional, resectional, salvational, sectional, sectionals, subprofessional, suctional, supernational, suppositional, supranational, torsional, tractional, transactional, transcriptional, transformational, transitional, unconditional, unconventional, unidirectional, unpunctual, variational, vibrational, visitational, vivisectional, volitional