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