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