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