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