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