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