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