As nouns the difference between dupion and durion
is that dupion is a double cocoon, made by two silkworms while durion is alternative form of durian.
durion
English
Noun
(
en noun)
* 1883 , Mary Mapes Dodge, St. Nicholas (volume 10, part 1)
- Poor monkeys! how I pity them. The only durions they can eat are the overripe ones, which fall from the trees and burst open.