There are lots of palindromic words that start with de- and end -ed. Here are some short ones listed in The Palindromicon II (Jeff Grant and Dan Tilque, Word Ways Monograph Series 6, 2002).
"Degaraged, Depiped, and Derotored,"
Word Ways: Vol. 40
, Article 19.
Available at: https://digitalcommons.butler.edu/wordways/vol40/iss3/19