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