Word pairs such as REJECTED-DEJECTER, RESERVED-DESERVER, and REDUCED-DEDUCER fall into the special class of anagrams which we may call "reed-deer pairs". One member of the pair begins with RE- and ends with ED-, while the other begins with DE- and ends with -ER. If the pair is DEDEERED and DEREEDED, we are left with an identical middle component. A person who isolates these middle components is both a DEDEERER and a DEREEDER. The middle ocmponent can be REREEDED and REDEERED (by a REREEDER and REDEERER) to form the original pair again.
"A Reedable-Deerable Alphabet,"
Word Ways: Vol. 30
, Article 19.
Available at: http://digitalcommons.butler.edu/wordways/vol30/iss1/19