Here's what rhymes with duplicational.
locational educational vocational relational rotational avocational probational occupational operational recreational observational generational gestational navigational translational correlational ideational subnational mutational aberrational informational motivational sensational situational vibrational congregational foundational associational variational coeducational invitational nonvocational organizational computational gravitational conversational denominational organisational representational conformational inspirational transformational improvisational noneducational confrontational nonoccupational nonoperational intergenerational nondenominational nonrepresentational interdenominational Words that almost rhyme with duplicational
occasional capable available payable attainable saleable salable assailable bailable claimable gradable incapable obtainable insatiable changeable debatable unshakable repayable unshakeable breakable trainable unsaleable unsalable reclaimable resalable sustainable traceable unavailable unattainable unchangeable ascertainable unassailable unbreakable degradable erasable irreclaimable persuadable conveyable inescapable biodegradable exchangeable explainable irreplaceable unobtainable inflatable maintainable replaceable untraceable mistakable unmistakable interchangeable unsustainable embraceable nonbreakable microwavable nonexchangeable noninterchangeable