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