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