We don't have synonyms for reprocessing yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are processing, repressing and preprocessing.
(n) :
(engineering, nuclear physics, uncountable) The process of extracting useful or valuable materials from used nuclear fuel, mainly focusing on the recovery of fissile and fertile material for use in fresh nuclear reactor fuel, or, in some cases, the manufacture of nuclear weapons.
(n) :
(engineering, nuclear physics, uncountable) The process of extracting useful or valuable materials from used nuclear fuel, mainly focusing on the recovery of fissile and fertile material for use in fresh nuclear reactor fuel, or, in some cases, the manufacture of nuclear weapons.