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