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