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