"Plumassier" Natural Recordings by Native Speakers
I couldn't find any result for the word "plumassier". It's possible that it's a misspelling or a non-existent word in English.
I couldn't find any word that matches "plumassary". It's possible that it's a misspelling or a non-standard term. If you meant "palimpsest," a palimpsest is a manuscript page on which the original text has been effaced or obscured so that other writing can be inscribed on it, often from a different period or in a different language.