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