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