Here's what rhymes with estimatable.
compatible incompatible Words that almost rhyme with estimatable
capital sagittal detachable unflappable nondetachable national adaptable mandible fallible cannibal laughable passable chasuble cantabile satiable savable international rational valuable casual grammatical tangible maximal palpable taxable impassable infallible tractable flammable cantonal madrigal merchantable blamable impassible bankable attractable fanciable practical radical diagonal invaluable irrational implacable intangible intractable clavicle factional inflammable lnternational octagonal supranational impalpable collapsible unpractical nontaxable graspable frangible declarable transnational fractional hexagonal impractical interactional transactional ungrammatical verapamil retractable nonflammable multinational understandable expandable semiannual