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