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