Here's what rhymes with congregational.
locational educational occupational vocational relational rotational navigational correlational avocational operational computational recreational conversational motivational conformational confrontational ideational subnational coeducational mutational aberrational nonoccupational nonvocational probational organizational gravitational informational observational sensational situational vibrational foundational generational gestational translational associational variational invitational noneducational denominational organisational inspirational transformational improvisational nonoperational representational intergenerational nondenominational nonrepresentational interdenominational Words that almost rhyme with congregational
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 unmistakable inescapable exchangeable explainable irreplaceable unobtainable unsustainable inflatable maintainable replaceable untraceable mistakable microwavable nonbreakable interchangeable biodegradable embraceable nonexchangeable noninterchangeable