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