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