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