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