Here's what rhymes with plenipotentiary.
century penitentiary Words that almost rhyme with plenipotentiary
sedimentary rudimentary alimentary testamentary parliamentary documentary supplementary complimentary uncomplimentary sensory treachery plenary beggary lechery peppery memory treasury jeopardy tenderly celery dispensary reverie feathery leathery directory accessory trajectory lethargy rectory intercessory cleverly westerly peremptory extrasensory exemplary refectory northwesterly southwesterly