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