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