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