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