Here's what rhymes with uninflectional.
inflectional inflexional sectional directional correctional bidirectional convectional complexional unidirectional Words that almost rhyme with uninflectional
retinal flexible exceptional spectacle intentional inflexible seminal attentional legible sentinel unintentional extensional unexceptional recessional electable medical professional chemical conventional terrible dimensional clerical festival incredible intestinal marital vegetable congressional credible genital parable plentiful sensual skeletal skeptical textual confessional sceptical unconventional illegible impeccable tenable bearable delectable execrable obsessional testable concessional processional tentacle collectible correctable impressible wearable breathable collectable conceptional spendable pentacle perceptional stretchable weldable bendable spreadable cerebral numerical sensible respectable susceptible amenable homosexual detectable insensible lamentable pedestal receptacle segmental impregnable ineffable polemical trigeminal alchemical expendable expressible psychosexual threedimensional unprofessional inedible nonprofessional insusceptible repairable amendable extendable forgettable perfectible suppressible connectable detectible nonclerical connectible quenchable noncollectable acceptable accessible perceptual heterosexual inaccessible perceptible unacceptable commendable dependable unbearable untenable detestable inexpressible irrepressible ostensible premarital regrettable unforgettable chimerical compressible digestible indigestible intertextual presentable preventable twodimensional undetectable urogenital anticlerical extensible prophetical suggestible premedical preventible subprofessional comestible nonnumerical unwearable congenital hypothetical indispensable biochemical multidimensional defensible geochemical incompressible incontestable indefensible intracerebral photochemical unquenchable contestable dispensable paramedical semiprofessional undependable recommendable unpreventable contemptible extramarital histochemical paraprofessional alphanumerical gastrointestinal comprehensible reprehensible physicochemical musculoskeletal immunohistochemical